Showing posts with label Winter thrushes. Show all posts
Showing posts with label Winter thrushes. Show all posts

Thursday, 12 December 2013

Early Winter Bird Survey - North West Zone

Gatwick Landscape Photographer of the Year
(self-appointed)

Sunrise: 07:45 December 9th 2013

Gosh... 

Spider webs on Dock seed heads, North West Zone

Oh my... 

 
Rough grassland and hedgerows, North West Zone

Goodness me...

Frost in the rough grassland, North West Zone

Ok, that's enough of that. On Monday morning, we began our Winter Bird Survey transect in the rough grasslands, north of the runway. I was accompanying Tom Forward of Gatwick Greenspace and volunteer James, for whom this was a first venture into birding. 

Rambling rosehips in the hedgerows

The open areas of grassland were mostly quiet and still, with bird activity being concentrated in the hedgerows. In the mud, there were plenty of animal tracks; clues as to who else had recently passed by...

Roe Deer tracks: the rear dew-claw marks are just about visible

Moorhen tracks

The hedgerows looked pretty awe-inspiring in the winter sun. Every section seemed to contain at least one singing Song Thrush; pretty unusual as spring is the normal time for staking out territories. A flock of around 10 Meadow Pipits broke the relative peace, peeping frantically overhead before settling in the hedgerows furthest from us.

Listening for thrushes in the hedgerows

Reed Buntings were in good numbers, hiding away in the tall Reed Canary Grass and then flitting up into the scrub. A Robin and a Dunnock were actively singing; a few Redwing were 'tseeping'; and mixed flocks of Great, Blue and Long-tail Tits nosily contact-called while foraging.

Blackthorn fruits (i.e. Sloe berries) and lichen

Approaching the first bend in the River Mole, a Moorhen squawked its presence and a Pied Wagtail passed overhead in bouncing flight. Our first flock of Fieldfare, a winter-visiting thrush from northernmost Europe, were nosily chatting away in the large Oaks overlooking the floodplain. On a bare patch of earth near the grassy slope, a Green Woodpecker had left its usual calling card...

In certain light, even bird poop can look quite marvelous.

Break it open and you will find the chitinous remains of ants

We had a poke around in the reed beds but sadly no signs of Water Rail, so Tom regaled us with an ear-splitting impression (although neither James nor I were really qualified to critique it). Still scattered around in the grass were feathers from the dead Grey Heron found earlier in the week - the foxes had an early Christmas dinner! 

Scrub West of Brockley Wood

Entering the scrub west of Brockley, a bout of action could be heard in the woodland margins with brawling Song Thrushes and a jeering audience of Redwing. Rounding the corner of the woodland, where the river passes close by, a mixed flock of Fieldfare and Redwing were happily foraging in the Hawthorn scrub.

Candlesnuff Fungus on river driftwood

Beginning our second transect further downstream along the Mole, Chaffinch, Goldfinch, Magpie and Reed Bunting were all in abundance. We also picked up a new first for this birding transect: a lone Rook. These birds are generally common around the airport so it is by chance they haven't cropped up earlier on our survey. 
   Continuing up the corridor of grassland along the river, we then entered a Fieldfare battle-zone! They were zipping back and forth over the river, between the lines of scrub and trees. Sounding rather like fighter plane machine-guns, one even let loose a small, tactical aerial-attack (fortunately though not directly overhead!).




Counting them was quite a challenge but we noted around 80 individuals in this one section, plus the usual handful of Redwing and Song Thrush. This is one of my favourite parts of the River Mole corridor, where the water passes over stones and gravel, creating 'riffles'. These fast-flowing areas are particularly beneficial for aquatic invertebrates, such as Stonefly and Caddisfly larvae.


Towards the end of transect 2, we paused to watch a brightly coloured Jay perched just a few meters ahead, posing proudly with acorn in beak. A moment later, there was a flash of orange and a Kingfisher appeared up on the tree. Then, it shot past us upstream, showing off its electric blue upper-side and bullet-like profile. We were also greeted by the lumbering flight of an impressive Grey Heron, moving off downstream... For James, these were two species he had never seen up-close, so well worth the early morning start!

Our two transects

Wednesday, 13 November 2013

November Thrushes survey: Weird and the weirder

North West Zone - View from the grassy slope

The British Trust for Ornithology (BTO) Winter Thrushes survey is a nation-wide study monitoring winter visiting and resident birds and the habitats they occupy. So far, I have carried out two surveys in October and only recorded two Blackbirds. As Tom Forward (Gatwick Greenspace Partnership) has more recently been hearing plenty of Redwing around Tilgate Park, it was with higher hopes on Friday that we set out around the North West Zone.
 
Weird grass goo - at first glance it looks like wet soap powder

It was a cold and grim morning as we began our route at the water treatment pond, so it was quite a contrast to be greeted by a flock of 16 Ring-necked Parakeets flying overhead. These bright green exotics are part of a colony on Charlwood Road and whatever your view on their pest status, I quite like the sound of their uptight squawking. Looking back down to the ground, we noticed some strange and gooey deposits scattered through the rough grassland...

Slime Mould covered in dark spores

I think this is a species of Slime Mould (Mucilago crustacea), aka the Dog Sick Slime Mould; when it is freshly emerged it is bright yellow in colour! My apologies if you were eating your breakfast just now.
   We looped around the northside of Brockley Wood, entering the sheltered scrub and marsh area to the west. Here we paused as a large band of small birds passed close by us, moving through the scrub. In this single flock we counted around 20 Long-tailed Tits, 18 Blue Tits, 7 Great Tits and one Wren. You may notice my birding photos have not really improved with time.

Passing tit flock

Back-end of a Long-tailed Tit feeding in a Willow

Other birds we recorded here included BlackbirdReed Bunting, Siskin, and a flock of Lesser Redpolls which were passing overhead. A Roe Deer suddenly hared down the track at light-speed, followed by the not-quite-fast-enough Border Control dogs which are regularly exercised by staff in this area. At the hedgerows to the south, we heard our first Song Thrush having a confusing sound-off with a nearby Dunnock, in turn seeming to do a great impression of a Blackbird.
  While ascending and descending the grassy slope, a group of 6 Skylarks wheeled overhead, calling excitedly before settling down in the distance.


Pushing on to the hedgerows south-east of Brockley Wood, the shrill 'sreee' of Redwings signalled our first winter thrush species. It seemed to be only a single pair in a flock also made up of Song ThrushBlackbird, more roving tits, several Nuthatch and Treecreeper.

As this flock passed us by we had a quick scoot around in the Blackthorn to see if we could spot any eggs of the Brown Hairstreak Butterfly. Sadly no luck there, but I did make this gruesome yet arguably awesome discovery...

The Ex-snake

It was the remains of a Grass Snake dangling in the hedgerow, high enough off the ground that it must have been dropped there by a bird. Our guess is that one of the resident Common Buzzards snatched it, sat in the tree above the hedge and then accidentally dropped its lunch.


Skin 'n' bones

Ok, so maybe it is a bit hideous, but still an interesting find! The particularly gruesome part was that the body was wrapped tightly around a branch - a feat possibly achieved while trying to free itself or during its death throes. A pretty undignified end!
   The autumn has been fantastic for berries, so right now the birds are pretty spoiled for choice. However, this crop of food is going to be essential this winter if it turns out as cold as has been speculated.

Rambling rose suffused with rose hips

Sloe berries on the Blackthorn 

Approaching the end of the survey, we squelched through the waterlogged and boggy area by the Compost Field woodland fragment. Whilst distracted by stagnant freezing water suddenly over-topping my boots, we inadvertently flushed a Woodcock, giving a loud clatter of its wings as it shot off through the willow scrub. It took us by surprise despite this being the ideal feeding grounds for this bird! Also a new first for Gatwick since we began recording birds here... once again never a dull day with the indomitable Mr Forward!


Woodcock
Eurasian Woodcock (Scolopax rusticola) - RSPB Website


Our Winter Thrushes route, taking in as many of the different habitats as possible