Category Archives: Garden birds

A stroll through the Meadow

Last Sunday I spent a glorious couple of hours in the piece of scrub near my house where me and the dog while away significant chunks of our time. He chases rabbits, cats, pheasants and generally enjoys doing what dogs do, and I marvel at all the wildlife to be found in my local bit of wilderness. It’s probably about 300m x 150m and it’s called ‘Rowleys Meadow’ even though it’s not a meadow, and it lies on the northern edge of the village with houses lining it’s southern periphery. On the east, west and north side are old hedgerows and some wonderful old trees and in the middle are stands of young ash trees, grassy areas and large clumps of brambles.

It plays host to an astonishing variety of wildlife which in the winter and early spring is mainly birds, although a peacock butterfly fluttered by last Sunday and on several warmer days since Christmas I’ve seen bumble bees flying around there . But on this particular day it was the birds that stole the show (click here for a full list of all my sightings on this outing on February 26th).

There are very healthy numbers of green woodpecker here due to the trees and the grassland where they can find there favourite food of ant and termites. They’re tricky to photograph in the Meadow because they’re hidden in the grass and they’re very skittish, so it’s difficult to get close enough when they’re on the ground or in the trees.

Green woodpecker with his black eyepatch and scarlet military policemans cap. This one did let me get close enough… just

There are regularly 5-10 green woodpeckers (Picus viridis, Dansk: grønspætte) to be found as I circumnavigate the Meadow. It’s easy to spot them, both the colours and the low bouncing flight, often no more than 15 feet from the ground, are very distinctive. And of course it’s call is like no other creature, if you’ve never heard it listen here. Scroll down to the entry from Lars Krogh from Lindet Skov in Denmark dated 19/04/2011 where there is a very good recording of a male greenie yaffling and drumming.

Another bird which I almost always see in the Meadow is the long tailed tit (Aegithalos caudatus, Dansk: halemajse). But for the tail, they’re tiny: the adults weigh 7-8g with a wingspan of 18cm. The long tailed tit is one of those creatures that make we wonder how such tiny ones can survive a long freezing winter. They can also be very difficult to photograph as they never stay still for more than a few seconds.


On final approach…

But when you are lucky enough to capture them they make delightful pictures!


Touchdown!

You may have noticed the lichens on the branches, I’ll share some photographs of those in the next post. In another tree adjacent to the one with the long tailed tits was a pair of great tits (Parus major, Dansk: sortemejse), among others. I like great tits, they’re handsome birds and they’re entertaining to watch feeding in my garden, especially when there is a family of them. The pair here are a male and a female:

Male great tit, his black stripe stretches all the way across his chest from toe to toe, making him very desirable indeed. I think the ‘A’ indicates he is the alpha male

The stripe of the female is much narrower:


Great tit female

And very shortly after I took the pictures of the great tits, a female sparrowhawk circled slowly overhead. The trees and hedges suddenly went very quiet as all the small birds concealed themselves from this fearsome predator. I’m not sure if she was hunting as I spotted a second, possibly a male, sparrowhawk circling much higher up. She was probably not more than a hundred feet up, but the male was several hundred feet up. I watched a pair of sparrowhawks do this over my garden once before, where the male was much higher, and I think it may be part of the courtship routine. (If anyone can confirm or refute that please drop me a line and let me know).


A female sparrowhawk circling over the hedges at the north end of the Meadow

All in all it was a very enjoyable and rewarding trip in bright warm sunshine and the  birdlife was there in spades.

All quiet on the Histon Front

Last weekend I posted about the blackbird war that was taking place in my garden on Saturday morning. By Sunday things appeared to be quiet first thing until two female blackbirds appeared and commenced battling for breeding rights.


One of the feisty females scanning her territory for possible competition

The females chased each other round for about half an hour when who should show up…


Blacktip

Hard on the heels of Blacktip came The Arch Rival, and as soon as the females established their pecking order, battle commenced. At the close of hostilities on Saturday the apparent winner was Blacktip but on Sunday the female appeared to have switched her allegiance and teamed up with The Arch Rival and both of them now joined forces to chase off Blacktip:


The Arch Rival gaining the upper hand


And Blacktip making a tactical withdrawal after some protracted aerial exchanges and succumbing to numerical advantage

Things cooled off considerably after Sunday but minor skirmishes took place until Tuesday with The Arch Rival and his moll the seeming victors. But ever since then the garden has been frequented by various blackbirds including Blacktip. So even if he lost the insemination rights he has still retained access to his feeding territory.

Fascinating stuff!

Garden Gladiators

For the last three mornings my garden has been frequented by numerous blackbirds (Turdus merula, Dansk: solsort), at least four; two males, two females and possibly others. I couldn’t tell the females apart because they looked very similar but the males were identifiable. One was a typical black blackbird with a striking yellow beak and the other was very slightly smaller, slightly more brown and had a dark tinge to the end of his beak so he has been named ‘Blacktip’.


Blacktip

The second male blackbird, henceforth referred to as ‘The Arch Rival’


And one of the ladies

The initial skirmishes of the Histon Blackbird Wars started in my garden on Friday but I didn’t have a chance to study it what with getting the children to school and myself to work. The real gladiatorial action took place yesterday morning and commenced with the males and the two females chasing each other around at high speed on the ground and in the air. I’ve never noticed before but when blackbirds compete on the ground they actually run rather than hop, which from the human perspective lends the whole drama a comic angle. I imagine they can move alot faster when running and are therefore more intimidating to any rivals.

The Arch Rival perched threateningly atop the rabbit run

The females departed fairly early on in the proceedings leaving the two boys to battle it out, and it turned into an amazing spectacle which was very entertaining to watch. The Arch Rival occupied a battle station on top of the rabbit run from where he would walk round the edge and look down at Blacktip on the ground, and from where he would launch the occasional strike and chase Blacktip  around for a minute or two before resuming his vantage point on the rabbit run. This behaviour led me to think the The Arch Rival was possibly the dominant male as he seemed to hold the advantage all along and it went on for probably half an hour or so before the real battle commenced:

Aerial hostilities break out
The dogfight slowly gains more and more altitude, toe to toe and beak to beak
Higher still, now around 4-5m off the ground
And then they separated and descended to draw breath in the wisteria.

This was followed by The Arch Rival resuming his place on the rabbit run which he circled around for several minutes before dropping to the ground and walking and running around the same route for a further few minutes whilst Blacktip remained on the ground. this cycle of events was repeated several times over the next hour.


The Arch Rival back on the rabbit run, Blacktip was lurking on the ground

This activity eventually petered out and Blacktip was left on his own to recuperate under cover of the buddleia bush. Leaving me to think that he was the apparent victor…


Blacktip in the cover of the buddleia foliage

…Or was he?

This morning Blacktip appeared with a lady and seemed to be performing a courtship ritual where he was running around on the ground calling and she was following. That went on for around half an hour and they seemed to be getting along famously. And then The Arch Rival arrived back on the scene and 20 minutes or so of aerial combat ensued. the dynamic was different this time though. The female and Blacktip seemed to be chasing The Arch Rival, not Blacktip on his own.

As I go to press the action has ceased and all the blackbirds have disappeared although both the males have made short forays back into the garden looking for some breakfast, but the female hasn’t returned. Incidentally while this was taking place, all the other birds: goldfinch, dunnock, house sparrow, blue tit, great tit, starling, collared dove and wood pigeon were using the feeders as normal, completely unperturbed by the battle taking place. My back window is like a 75 inch 3D HD TV showing nature documentaries all day, to which I can add my own commentary. As I write a pair of fieldfare are flying over and the blackbirds have been replaced by three dunnock.

And now… all three blackbirds are back and fighting again, so I’m going to sign off and watch them and I’ll report back with further developments.

Springtime sojourn to the Suffolk coast

Last week we headed off to to the seaside for a few days and our chosen detination was Dunwich, a tiny village on the Suffolk coast which in medieval times was the capital of the region and a thriving, wealthy port for moving cargo and people between East Anglia and the European mainland. It’s an amazing place with very interesting history which I wrote about in a post last year.

We stayed in my favourite inn called The Ship which has panoramic views over the Dingle Marshes which stretch several miles north to Walberswick, which is renowned for it’s annual crabbing champi0nship. It is also where the king of art nouveau, Charles Rennie Mackintosh moved to after he had abandoned architecture to become a watercolourist and where the series of flowers known as the ‘Walberswick collection’ was painted.

The marshes along this part of the coast are full of wildlife, including rare birds such as harriers and bittern, mammals such as otters as well as a host of marsh and heathland plants and the associated fauna. It’s a wonderful place. The view from our window at The Ship was generally dominated by low grey cloud which occasionally saw fit to rain on us, but even so the wildlife was much in evidence without even leaving the inn:


The tree opposite our window played host to numerous small birds including this house sparrow (Passer domesticus, Dansk: gråspurv) and blue tit (Cyanistes caerulius, Dansk: blåmejse)
And a couple of hundred metres beyond the tree were some pools of rainwater where lapwing and these teal were on parade each morningAnd beyond that was a ditch where a little egret (Egretta garzetta, Dansk: silkehejre) was hunting every day

So, as you can imagine, it wasn’t so easy to haul myself away from my nice centrally heated room and my cup of tea and go out into the wintry mornings, when I could sit by the window and see all this! But I eventually extricated myself and walked a circuit of the village taking in the local church and graveyard, the remains of the Franciscan Friary and the woods inbetween, and was very adequately rewarded. The local church has the remains of a medieval leper hospital in its grounds which is a fascinating place historically, but is now inhabited solely by sheep and snowdrops (Galanthus nivalis). There were no sheep while we were in there but the snowdrops were growing out between the melting snow.


Snowdrops infront of the be-lichened walls of the ancient leper hospital in the grounds of St James church


A lapwing pair pausing in the Friary between displays of breathtaking aerobatic excellence

The Friary is long deserted by the Franciscan brethren and is now a ruin, but it still plays host to the local wildlife. As well as the lapwing (Vanellus vanellus, Dansk: vibe) , there was a songthrush (Turdus philomelos, Dansk: sangdrossel) foraging amongst the  grassy tufts and robins (Erithacus rubecula, Dansk: rødhals) singing from the trees beyond.

A deciduous tree adjacent to the Friary was completely covered in lichen

I don’t know which species the lichens are on the tree trunk but I think there are at least four. The flat resupinates can be seen on old wood and even brick walls in towns and villages, but the feathery species are much more susceptible to atmospheric pollution and therefore only exist where the air is clean.

Beyond Dunwich to the south is the gorse covered heathland of Dunwich Heath which is owned and managed by the National Trust, and beyond that is the RSPB reserve at Minsmere where I watched a marsh harrier quartering the reedbeds and where another walker told me he had seen smew and a bittern in one of the lakes on the reserve. I went to look there but I didn’t see either, but I did see other birds, and some splendid lichens. Of which more in a later post.

More hungry garden birds

When the snows arrived a couple of weeks ago my garden immediately became host to all the species of garden birds that normally feed there and which had been absent for the whole of this winter. So I couldn’t resist taking some photographs, a few of which appeared a couple of posts ago, and the rest are here…


A hen blackbird was one of several trying to prise worms from the icy ground


A female great tit taking peanuts from the seed tray


Cock chaffinch eyeing up the seed scattered on the ground under the frosty buddleia

One of my resident robins perched on the seed tray after a feast


A blue tit waiting in the buddleia bush for a chance to get on the feeders

The sun came out early which made photography considerably easier, but it was tricky to ge the exposure right when a bird was stood on snow reflecting sunlight:


A dunnock pecking seed from the grass. They have gorgeous colours when illuminated by the sun


This starling was distracted by me and stared straight at the camera

And finally a goldfinch perched in the buddleia before the sun broke through the clouds hence the high ISO and grainy look.

A dearth of information in this post but I hope you like the pictures as much as I enjoyed taking them!

The Songbirds Return

Up until February we’ve had an unusually mild winter and it was noticed across the country that songbirds were not frequenting gardens simply because there was abundant food in the countryside so they didn’t need to avail themselves of our feeders. The RSPB were advising people to clean their feeders and place a small amount of feed in so that passing birds would recognise it as a source of nourishment if times got tough. So a couple of weeks ago I topped my feeders up in anticipation of some cold weather and saw nothing apart from my resident cock blackbird who likes to dig worms out of my lawn.

And then the times did indeed get tough. The snow came last Saturday, lots of it, and on Sunday morning the transformation in my garden was immediate and the place came alive with hungry squabbling birds. Hen and cock chaffinch brought welcome splashes of colour:

Chaffinch are normally ground feeders so I’m not sure if this lady was confused by the contraption or the snow covering the hole.

(There’s a fungus there too on the branch of my plum tree which I must put some effort into identifying).

The sky was completely white and murky with total low cloud cover after the snow, so all the colours of the birds were muted and photography was challenging. Even the colours of this cock chaffinch, which was looking for seeds on the ground (more customary chaffinch behaviour), proved difficult to capture:


As well as chaffinch, dunnock, robin, blue tit, long tailed tit, collared dove, wood pigeon and blackbirds were all availing themselves of the platter. All the birds are welcome but the collared dove and particularly the wood pigeon can completely clean up in a matter of minutes, leaving very little for the other birds, so this time I put enough food out for all the visitors. A pair of great tit were gorging on some chopped peanuts, they are cautious birds and would visit the seed tray, pick up a piece of nut or seed:


Parus major – great tit, the male of the species

…and carry it off to the adjacent buddleia where it clamped the nut between it’s claws and pecked at it until it was gone, and then fetched another. If they’re not disturbed they can carry on flitting to and fro many times.


Female great tit demonstrating classic great tit feeding behaviour

I was shown how to easily differentiate between the male and female great tit by some bird ringers at Wicken Fen. They had caught a male in their net and the way to tell is by the width of the black stripe down the breast. The female has a thin stripe and that of the male is much thicker and can broaden as it descends widening to fill the gap between the legs. The broader the stripe the more attractive he is to the ladies.


Greenfinch – the first one I’ve seen in my garden since last winter

I often see, and hear, greenfinch in the trees where I walk and also the ones around where I work on Cambridge Science Park, but unless the weather is particularly inclement they don’t often venture into my garden, so this one was a welcome visitor.

Male house sparrow looking for a top up

None of my garden visitors were particularly unusual but it was lovely to see so many at once and to discover they were still out there. So I shall keep feeding them until the weather warms up and they move back to countryside.

2011 – That was the year that was

Every month of the year has different conditions which create environmental niches that favour different flora, fauna and stages of life cycles. So as 2011 rushes headlong to its wintry conclusion, for my last post of the year I was going to select a single photograph to represent the month to month changes in our wildlife throughout the year. And that was of course impossible for a number of reasons, mainly because it was impossible to represent any one month with a single image, and also because I have lots of images that I like and I want to share. I eventually managed to whittle the number down to an average of two per month which include a wide range of our native creatures in the UK including birds (migrants and natives), butterflies, moths, flowers, amphibians and fungi. I hope you like them!

January

Every autumn  lots of bird species vacate our shores to head to warmer parts of the world while we endure the cold of winter, and they’re replaced by other species which come from the north to the relative warmth of the UK in winter. Last year the autumn and winter weather in Scandinavia was ferocious and consequently many birds arrived here in larger numbers than usual, including the gorgeous waxwing. Along with the waxwing, redwing and fieldfare came too, as they do every year, and remained until the spring, providing some welcome colour.

On a bright cold January day a lone fieldfare perched in a tree

February

February was cold and the middle of the month saw us taking the children to the coast for our annual spring half term excursion, and this year we headed to the Suffolk coast at Dunwich. Dunwich is a really interesting place for lots of reasons, not least because the wildlife there is rich and varied. One of the harbingers of springtime which I look forward to every year is the flowering of snowdrops, and the woods on the edge of Dunwich were covered in them:


A carpet of snowdrops in the woods at Dunwich Greyfriars

March

By March many flowers were blooming and the fauna was turning it’s thoughts to matters procreational. And this dunnock was no exception:


A dunnock serenading the ladies from a bramble stem on Cambridge Science Park

Dunnocks have a rather to-the-point approach to the art of regeneration. They don’t get together in pairs as most birds do, they form small groups and mate with multiple partners and the males go as far as to remove packets of sperm from the cloaca of females who have been inseminated by rivals prior to passing on their own DNA. No nonsense!


A robin singing for a mate in an alder tree, also on Cambridge Science Park

And of course the birds aren’t the only creatures to get the urge in March. For the past 2-3 years a guided busway has been built between St Ives and Cambridge and as it approaches Cambridge Science Park it passes alongside a lake that is a spawning ground for thousands of toads which live in the adjacent woods and fields. The busway has therefore cut off the toads from the lake and, driven by the unstoppable instinct to reproduce, this pair were trying unsuccessfully to negotiate the sheer walls of the track. For a week in March I would get off my bike every morning on the way to work to help as many of them across as I could find.


The male toad is hitching a lift on the back of the much larger female on the way to the water to spawn

The male toad locks onto the back of the female with his front claws around her chest and he’s not at all keen to relinquish his grip until they’ve reached the water and he’s fertilised her eggs. After which armies of lone toads can be seen heading back the other way.

Fortunately for the toads Cambridge City Council funded the installation of toad tunnels under the busway so next year they should be able to negotitate the track and avoid the carnage which would otherwise have ensued. Hats off to the Council!

April

This month was a real wildlife fest and many types of creature allowed me to take some great photographs. The trees now have shooting leaves so everywhere has that lovely green colour from all the fresh growth.


Windswept male yellowhammer in the top of a hawthorn tree

The yellowhammer is a species which has become less and less common in recent decades as a result of hedgerow destruction and other modern farming methods, but we’re lucky to have plenty of hedgerows still in situ on the outskirts of Histon, and consequently, good numbers of these lovely yellow buntings. The hedgerow this one is on is mature and has old oak and ash trees in so it plays host to alot of bird species including blackcap, chiffchaff, dunnock, common whitethroat and green woodpecker, to name but a few.

Whilst sitting watching TV late one evening in March, what I initially thought was a bat emerged from behind the sofa I was sitting on with my wife. There had been no prior warning of its presence and myself and my wife both levitated off the sofa uttering something along the lines of “What the heck was that!?”. It fluttered into a lampshade where it staid long enough to get a photograph, and it turned out to be an emperor moth:


Our emperor moth inside a lamp. I though creatures like that only lived in tropical rainforests!

Unfortunately, a couple of days later I found her dead (she was the female of the species) still inside the lampshade. I extricated her and measured her and she was 7cm wingtip to wingtip. A magnificent beast.


A willow warbler beautifully framed by new leaves and blossom of the blackthorn tree

These little warblers which weigh on average around 9g have just arrived from southern Africa. I think bird migration is one of the most amazing natural phemonena – how does such a tiny creature navigate and survive a flight across the Sahara and then the Mediterranean? It’s absolutely incredible.


A pair of great crested newts getting ready to mate in a shallow pond – male on the left, more slender female to the right

The great crested newt was probably the highlight of my year. I’d never seen a newt before and in this pond there were great crested, palmate and smooth newts. I turned the flash power down and used an 18-55mm lens and got some reasonably good photographs of the newts underwater. And that at 1am after a few hours in the pub!

May

I’ve spent many a fruitless hour chasing orange spot butterflies up and down the hedgerows of Cambridgeshire, but they never seemed to settle for long enough to get a photograph. But one morning in May I must have timed it just right, they were in the mating mood.


Female orange spot announcing her availability in somewhat unambiguous fashion to a passing male who was just out of shot


Common whitethroat – these warblers also migrate to the UK from sub-Saharan Africa

The common whitethroat breeds in my local fields in good numbers. It’s easy to identify by its song and the way it perches on brambles and low scrub and then flits almost vertically up into the air to alight a few seconds later close to where it took off from and continue singing. This one is a male, he has a blue/grey head whereas the female has a brown head. As well as avian migrants from warmer climes, at this time of year many species of dragonfly are emerging:


Scarce chaser dragonfly at Milton Country Park

I like dragonflies. In the days of the dinosaurs there were dragonflies with a 75cm wingspan! They are fun to photograph (and often, not too difficult) they look awesome, and they have very interesting life cycles. My scarce chaser sat on a seed head for several minutes whilst I stood a few feet away photographing other dragons and damsels, occassionally he took off to circle the pond before returning to the same spot where he let me get to within around 50cm to capture his portrait.

June

In a normal year the weather will be warming up  nicely by June and flowers and insects and birds should be in abundance. But 2011 wasn’t a normal year, April was unseasonally warm which kick started everything, but the rest of spring and summer were cold and this had dire consequences for many butterflies and other species. One of the few that I did see in reasonable  numbers this year, although not as many as last year, was the large skipper.


Large skipper feasting on the nectar of a thistle

The marsh woundwort is so called because it has been applied to wounds to assist the healing process. I don’t know what the medical basis for that is, maybe it has antispetic properties. It  has a beautiful flowerhead and is one a good number of wild flowers growing in the drainage dikes on the local farmland around Cambridge.

Marsh woundwort poking it’s lovely head out of a drainage ditch which is full of various wild flowers every year

July

I found this splendid looking cricket lurking in the grass in a field on the edge of Histon. I first thought it was a very green grasshopper until I looked more closely at the photograph, and it turned out to be a Roesels bush cricket. It is an introduced species from mainland Europe which until recently was only found in the most southerly parts of England. There are two varieties and this is the long winged one which can colonise further afield faster than its short winged cousin, and is now as far north as Cambridgeshire and beyond.


Long winged Roesels bush cricket

This was the first of its kind that I’d seen and a few days later another one appeared on a blind in my house, so I guess thay can’t be that uncommon in this region now.

A pair of juvenile linnets

Before I got out walking in my local countryside around Histon I can’t remember the last time I saw a linnet, but they breed here in good numbers and in the winter flocks of many tens to hundreds can be seen on farmland around and about Histon. Linnet are finches which feed on seeds and the adult males are splendid with a cerise breast and a crimson spot on their foreheads.

August

When I was at school, many years ago, my Dad would feed the birds in the garden and it wasn’t particularly unusual to see the occasional bullfinch.  But mainly as a result of persecution their numbers declined dramatically through the 1970’s and 80’s and I didn’t see one for years. The males are beautiful birds and I’ve been after a good photograph of one for a long time. And finally…


A male bullfinch crunching seeds at RSPB Fen Drayton

I love this picture – so far it’s the first and only half decent one I’ve managed. Hopefully I’ll get a few more to share with you in 2012.

Later in August, we were on holiday in Northumberland, and amongst the many gulls and other seabirds on the beach at Seahouses was this redshank. I think it’s nature at it’s aesthetic best!


A lone redshank looking for nourishment in the rockpools at Seahouses

September

The biggest garden spider I’ve ever seen – she was around 4cm across

Another of natures harbingers, this time of autumn. My garden fills up with these polyocular purveyors of terror in September, and this lady was huge. She was 4cm across and was big enough to distract my son from a telling off. ‘Dad, there’s a big spider in my window‘ was an imaginative and very effective way to divert my attention from the misdemeanour of the moment. I ran to get my camera and I had to lay horizontally out of the bedroom window to take this photograph, as a result of which I couldn’t stay still for more than a few seconds!

October

After the coldest summer for 18 years we then had a mild autumn which meant that many creatures could be found out and about long after they have normally  migrated or hibernated, or died off. Swallows and swifts were still being seen into October and a bumblebee flew past my lab window one day last week. During a visit to Milton Country Park, on the northern edge of Cambridge, on 28th October, to see what winter wildfowl had arrived, there were some winter visitors including tufted duck, gadwall and widgeon. But the pontoon I was stood on had around half a dozen common darter dragonflies on it along with several species of damselfly in the surrounding reedbed and a lone migrant hawker patrolling the air which took a common darter and butchered it on the wing right over my head. Dragonflies can be seen late in the year when the weather permits, but even so I was surprised to see so many at the end of October.

A pair of common darters mating in the late autumn sunshine

November

One of my November excursions took me to RSPB Fowlmere, between Cambridge and Royston, which is renowned for its water rails. I don’t think I’d ever seen one before but I was tipped off by a fellow naturalist that there was one in front of a particular hide, so I headed off there and there it was, busy foraging in the pond for the whole hour I sat there. It was very murky so the photographic conditions were difficult, but I managed to get a couple of decent pictures and I particularly like this one:

A water rail in the primeval swamps of Cambridgeshire!

And another of my trips in November was to Norsey Wood in Essex which is a very different ecosystem to Fowlmere, consisting of ancient oak, beech and birch wood. So in autumn the forest floor is a really good location for fungi and this fly agaric was one of a large group growing out of the leaf litter.


Fly agaric mushroom amongst the fallen beech leaves of Norsey Wood

December

And finally, a wildlife success story is the long tailed tit. Until the last 10-15 years I only saw these occasionally but they now seem to be common, in direct contrast to so many other species of bird whose numbers are declining. I regularly see flocks of long tailed tits on the feeders in my garden and in the hedgerows and woods around Histon. They’re gorgeous little birds and I love watching a flock of them follow each other one after the other along a hedgerow before bunching together when they have found a food  source and then heading off again in line astern.

A long tailed tit in the hedges along Guns Lane in Histon

I stood quietly for several minutes watching the flock of around 15 birds that this one belonged to and they didn’t seem at all bothered by me as they picked insects from the trees.

So there you have it. 2011 in pictures. If you had the stamina to get this far, thankyou and I hope you enjoyed it.

Best wishes for a very happy Christmas and a peaceful and successful New Year from The Naturephile!

Where have all the birds gone?

There are virtually no birds in my garden at the moment, and they have been conspicuous by their absence all through the autumn. This appears to be a more widely observed phenomenon as reported on BBC’s Countryfile, and the RSPB have been seeking to reassure people who are concerned by the apparent dearth of birdlife visiting their gardens that it’s simply due to the abundance of suitable food still accessible in the countryside, and whenever possible that’s where the birds prefer to be.

I can vouch for the disappearance of the small birds from gardens. Apart from the occasional blackbird and blue tit  (and a jay last week – the first one I’ve ever seen in my garden!) very few birds are availing themselves of my feeders. If this is happening in your garden the best thing to do is to keep your feeders clean and put a small amount of feed in so any passing birds recognise your garden as a source of food and can stop to refill if they need to. But it looks as thought the cold weather is starting to arrive here in Cambridgeshire so garden bird numbers may well increase in the near future.

So last weekend I ventured to the fields on the edge of Histon to see if they are still in residence. The hedges and fields were well populated with goldfinch (Carduelis carduelis, Dansk: stillits) and chaffinch (Fringilla coelebs, Dansk: bogfinke), great tit (Parus major, Dansk: musvit) and long tailed tit (Aegithalos caudatus, Dansk: halemejse) and green woodpeckers were abundant too. I don’t know if the numbers of green woodpecker (Picus viridis, Dansk: grønspætte) I see are representative of national trends but they seem to be numerous here in Histon, also where I work on Cambridge Science Park and today I was at the RSPB reserve at Fen Drayton near St Ives and there were good numbers there too. Two birds that I haven’t seen recently in the numbers I’d expect are dunnock and greenfinch – I hope that’s because they’re out in the countryside and it doesn’t reflect a decline in overall numbers.

I talked in my post a couple of weeks ago, Forests and Fungi, about how I’ve been inspired to look for other ways of photographing nature rather than simply taking traditional portrait shots. Rowleys Meadow which is on the edge of Histon, has mature ash trees (Fraxinus excelsior) on the periphery which are laden with ash keys and as a result there are thousands of young ash saplings:


Brown grass stems merge with the taller, thicker, silver stems of the ash saplings

And this presented a good opportunity to capture some abstract nature images. I like the way the low, bright sunlight creates a vertical pattern of silver and shadow as it illuminates hundreds of young ash trees

Back to birds, as well as our regular winter residents migrants from Scandinavia are much in evidence, redwing (Turdus iliacus, Dansk: vindrossel), and fieldfare (Turdus pilaris, Dansk: sjagger):


A lone fieldfare perched in a tree after gorging on a blackthorn bush laden with sloe berries

Small flocks of fieldfare can be seen and heard making there distinctive and diagnostic call, and the flocks will get bigger if the weather does turn wintry. Last winter, which was brutally cold here and in Scandinavia, huge numbers of waxwing (Bombycilla garrulus, Dansk: silkehale) arrived in the UK from Norway, but due to the much warmer weather I don’t think we’ll see them here in quite such abundance this year, which is a real shame because they are indeed spectacular:


Waxwing – it’s around the size of a starling and the colours are amazing

Histon has a resident rook colony (Corvus frugilegus, Dansk: sibirisk allike) who have their rookery in the tall trees adjacent to the church and are a constant source of aerial entertainment. They were feeding in a field along Guns Lane, which runs from Histon to Ely, as I wandered along it and this one took exception to my presence and flew over squawking at me as it went,

I took the hint and moved on, heading home. But a little further along Guns Lane I paused when I heard the quiet and delicate song of a flock of long tailed tits. So I stood still and they went about their routine in trees about 10m away. I really like these diminutive, gregarious, birds and I love trying to photograph them, which can be challenging as they are very small and they never settle in any one place for very long. But I managed to get this series of shots which I’m rather pleased with:

Even though the weather is pleasantly mild at the moment, I prefer winter when it’s cold, so I’m hoping it will start to behave as it should and these delightful little birds come back to feed in my garden!

The balance of nature

At the end of May this year the BBC screened an episode of Countryfile in which John Craven interviewed a member of the scientific staff at the Game and Wildlife Conservation Trust (GWCT). Taking things literally I’d assumed the this was a trust who’s aim was the conservation of game and wildlife. However, as the interview progressed I began to question this assumption as the discussion centred around a study to be carried out by the GWCT in which magpies were to be eradicated from a specified test area to assess the local effect on songbird populations. I don’t think that removal of a native species such as the magpie by trapping and killing them is an ethical way to study predator/prey relationships. But is it scientific?

The magpie – villain of the piece – apparently

The interviewee from the GWCT, Dr Jeremy Stoate, justified the cull on scientific grounds suggesting that increased predator numbers result in significant reductions of prey populations and the species they identified as being largely responsible was the magpie.

Magpies are bold, brassy, ubiquitous, and are generally percieved as being a tad raffish. They undoubtedly predate songbird nests, but I struggled to understand how this could justify slaughtering them. Numerous other species of bird and mammal such as sparrowhawk, kestrel, owls, great spotted woodpeckers, rats, stoats and probably the biggest killer of small birds, domestic cats, all predate songbirds and some raid nests to poach eggs and chicks.

So why was it only magpies that were to be exterminated?

The action was being justified on a scientific basis, and whilst I’m no ecologist, I am a scientist, and the whole thing seemed unscientific, so I decided to do a little research of my own on the subject. Interestingly, since I did my initial research in June, it appears that references to the study on the GWCT website have been taken down. At least, I couldn’t find any.

However, what I did find out was that the study was commissioned and financed by another ‘conservation’ organisation called Songbird Survival. Whilst I believe that GWCT do have a genuine interest in the countryside as a whole, the same cannot be said for Songbird Survival. It is a registered UK charity whose statement of activities on UK Charity Commission website is this:

THE PRINCIPAL OBJECTIVE OF THE CHARITY IS TO IMPROVE, PROTECT AND PRESERVE FOR THE BENEFIT OF THE PUBLIC THE POPULATION OF SONG AND OTHER SMALL BIRDS BY THE CONSERVATION AND RECREATION OF HABITATS, BY SUITABLE EDUCATION OF THE PUBLIC AND LOBBYING MP’S AND THE HOUSE OF LORDS, TO EFFECT CHANGES IN THE LAW WHERE WE FEEL IT IS NECESSARY.

However, the details on the Charity Commission website also list the trustees, and that makes interesting reading too…

LORD COKE, MR CLIVE PATRICK SHERWOOD, MR FRED VALENTINE INGRAMS, MR JOHN RICHARD PUGH, LORD MICHAEL RICHARD RANKEILLOUR, MR ROBERT JOHN MIDDLEDITCH, MR DAVID GRIFFITH, MR NICK FORDE, LORD JOHN HADDINGTON, MR HUGH VAN CUTSEM, MR COLIN STRANG STEEL

All of these trustees are big landowners, or relatives of landowners, some with shooting estates, and they all support hunting and shooting. Lord Coke is the owner of Holkham Hall in Norfolk and he and several of his gamekeepers have been prosecuted for killing birds of prey by shooting and poisoning. So I’m struggling to believe that these people really have the best interests of songbirds at heart when they are funding ‘scientific’ destruction of a single predator species which has been implicated in taking gamebirds. And via the titled gentlemen listed as trustees they would be ideally placed to carry out their stated aim of ‘lobbying MP’s and the House of Lords‘.

Back to the science though. I recently attended a lecture in which Dr Mike Toms of the British Trust for Ornithology (BTO) talked about garden birds and how gardens are becoming an increasingly important sanctuary for increasing numbers of songbirds, and therefore predators, such as magpies, great spotted woodpeckers and sparrowhawks. In the course of his lecture Dr Toms talked about the decrease in songbird numbers and how magpies were being blamed but said that magpie predation was not the cause of the decline in numbers but habitat destruction and current agricultural practices were the primary reasons. I emailed Dr Toms and he was kind enough to send me several links to published work by the BTO into bird predation. This list included this publication: ‘Population changes of avian predators and grey squirrels in England: is there evidence for an impact on avian prey populations? Journal of Applied Ecology 47: 244- 252‘ describing a collaborative study between the BTO, GWCT and the University of St Andrews in which the impact of 2 groups of predators, those which predate adult birds and fledglings and those which predate nests (including the magpie) were analysed for 29 prey populations. Quoting directly from this paper:

For 22 avian prey species, there is no evidence that increases in common avian predators and grey squirrels are associated with large-scale depression of prey abundance or population declines‘.

Then:

Unexpected was a large number of positive (my italics) associations between predators and prey, particularly for native avian nest predators, which largely exonerates these predators as driving declines in passerine numbers

And:

Analyses of large-scale and extensive national monitoring data provide little underlying evidence for large-scale impacts of widespread avian predators and grey squirrels on avian prey populations…

The paper also describes negative correlations between the remaining seven prey species and predator numbers, and accepts that some of these may be causally related. Although e.g. the relationship between sparrowhawk and tree sparrow is probably significant, that between buzzard and goldfinch almost certainly isn’t. However, in an email from Dr Toms to me he indicates that the GWCT study showed negative causal relations on  a local level but, crucially, not at a population level.

This last point is key to the argument. In a study of population dynamics, if conclusions are to be drawn about overall depletion of numbers in response to a specific influence small local studies cannot be extrapolated to enable conclusions for the population as a whole, and to do so is erroneous at best, misleading at worst.

Incidentally, I also found a publication on the website of Songbird Survival entitled ‘Detecting an impact of predation on bird populations depends on the methods used to assess the predators’, (Methods in Ecology and Evolution (2010),1,300-310, Nicoll M., Norris K.). This is an interesting paper because rather than analysing actual population data it investigates the methods used to analyse the data. And in the summary the last point recommends: ‘…the findings for studies which use opportunistic data, for a limited number of predator species, should be treated with caution and that future studies employ bespoke census techniques to monitor predator abundance for an appropriate suite of predators.’

This is interesting because it argues that the methods used to analyse opportunistic, observational data must be carefully optimised to ensure that conclusions drawn from the data adequately reflect the observations.

None of the publications suggest that slaughtering the predators is a rational scientific way to assess the negative impact on prey species. And I’m inclined to think that culling is poor science, particularly as the latest evidence suggests predator numbers don’t reflect negatively on songbird populations and in some instances there is actually a positive correlation between predator and prey, presumably because the predators remove the sick and the slow before they can add their DNA to the genepool.

I think the notion that predators destroy prey populations is bizarre because I was taught, and importantly, I believe it to be the case, that prey abundance determines predator numbers, not vice versa. If prey numbers decline then shortly afterwards so do predator numbers. Taking the reverse of this theory to it’s logical conclusion, if predator numbers determine prey numbers, all prey species would eventually become extinct and then the predators would also become extinct and the balance of nature which has prevailed for the last few billion years would be turned on its head. Which is absurd.

So population studies which are centred around the slaughter of predators seem to me to fly in the face of all current theory and are therefore morally indefensible aswell as being scientifically unsound, especially when commissioned and financed by such obvious vested interests as Songbird Survival.

Colourful Corvids

Rooks, crows and jackdaws are the most commonly seen and easily identified ‘crows’. They’re all black and they are widespread across the UK. But they’re not the only members of the crow or ‘Corvid‘ family. Ravens and choughs are also black members of the crow family, although the chough has bright red beak and legs, but both these species are fairly uncommon and seen mostly at or near the coast. There are two common and more colourful crows, the magpie (Pica pica, Dansk: husskade) and the jay (Garrulus glandarius, Dansk: skovskade).


Magpies can be seen everywhere, this one was in a tree opposite my garden

Magpies have an unfortunate reputation on two counts. They are considered to be inveterate thieves, having a particular fondness for shiny objects and they are generally reviled for their feeding habits during nesting of raiding other birds nests and predating the chicks. Of which more in another post. It seems to me they are handsome birds which are much maligned, they simply do what all wild creatures do, i.e. whatever is required to survive and propagate the species. While I watched this one I could hear several green woodpeckers (Picus viridis, Dansk: grønspætte) yaffling around the field and eventually one chased this magpie away from the top of the tree:


The woodpecker, bottom left, was extremely unhappy with the presence of the magpie and voiced it’s discontent with lots of shrieking as it flew aggressively into the tree

Jays are less frequently observed than magpies, predominantly dwelling in wooded areas in the countryside, but they are also seen in towns and villages where there are wooded areas. I’ve seen them along the Backs in Cambridge, and my friend who lives in a less wooded part of Cambridge has photographed them in his back garden. I encounter the occasional jay brightening up the day when I’m out walking around Histon, but last Sunday I had eight sightings, which is completely unprecedented. There were at least five individuals, one pair appeared together in the fields followed by a separate one a few seconds later, and another pair were busy burying acorns in the orchard opposite my garden. And they are spectacularly colourful, not at all what one might expect from a crow:


The splendid plumage of the jay!

Several jays and magpies came and went from this spot at the top of the tree in the space of a few minutes.


And when in flight the electric blue flash on the wing-bend opens up into a fan


As well as having an eye for sparkly trinkets jays are accomplished stashers and hoarders, and I’ve heard that a single jay can stash as many as 5000 acorns. They also show higher levels of intelligence whilst stashing, if they become aware they are being watched they will pretend to stash and then move away and hide their acorn somewhere else. I think that’s remarkable behaviour; moving away and hiding food elsewhere is one thing, but awareness of what another creatures intentions may be, and reacting to that by subterfuge suggests  a level of underdstanding and reasoning not commonly associated with creatures other than humans.


On the ground with an acorn in its beak looking for a suitable burial site, and checking its handywork :

As I watched this pair of jays at work, one of them put it’s acorn down and picked up a short stick, probably around 10cm long, and used it to make holes to bury the acorns in. So as well as the other tricks this jay used a tool to make bigger holes in the ground than it could manage with it’s beak in order to secrete its winter food supplies.

They’re remarkable birds, the Corvid family, and half an hour spent watching any crow species is entertaining and more than a little thought provoking.