Showing posts with label sanderling. Show all posts
Showing posts with label sanderling. Show all posts

Monday, April 25, 2011

5th April 2011: Kapar Power Station, Selangor

A few more shots from my second day at the roost (morning and evening).



This is the roost before dawn, lit by the security lights.

There's a video here. See how many birds you can id!I can see Marsh Sandpipers and a sand plover, and hear Terek Sandpipers ("wi-di-di"), Common Redshanks (single downward-inflected "tew") and Savanna Nightjar (regular 'chwizz') with some Black-crowned Night-heron calls in the background (a duck-like "kwak").







Simon's White-faced Whimbrel was around again today, and I got some better pics of it.



And some more normal ones!



At last I got a nice comparison shot of Black-tailed (front) and Bar-tailed Godwit (right rear) in non-breeding plumage. Apart from the difference in size, leg length and upperpart colour and pattern, this picture shows the difference in supercilium pattern well.



And this one the difference in underwing pattern and flight profile.





A Bar-tail against a threatening sky.



And a flock with a Whimbrel.



A better shot of Marsh Sandpipers in flight than I got yesterday.



Common Redshank (left) and Terek Sandpiper (right) showing the difference in upperwing pattern and leg length.



Two Red Knots and a Great Knot behind. The left hand Red Knot is surely of the 'piersmai' race. The right hand one could be 'rogersi', but equally, could be a female or later moulting 'piersmai', as far as I can tell! Can anyone shed further light?










































A couple of Grey Plover portraits.



A couple of Lesser Sand Plovers, showing a)how long and sharp the bill can be on 'schaeferi' birds and b)that sand plovers can sometimes show quite a prominent pale collar when in worn (in this case, 1st summer) plumage.



A plover with a mostly white head would normally get one thinking about Oriental Plover at this time of year! However, this one, with its pink, black-tipped bill, clearly isn't! It's a leucistic Lesser Sand Plover.



What amazed me was that I only 'saw' this bird during my fourth visit to the roost in two days (even though it was right in front of me yesterday - did you spot it in this photo?). Could I have missed a Spoon-billed Sandpiper? Absolutely!



In 2008/9 we had a sandy-coloured Lesser Sand Plover (here) and a mostly white Common Redshank (here). Leucistic or albino birds usually don't last long in the wild, where it's definitely not an advantage to stand out from the crowd! I wonder whether we'll see this one again. The bill is interesting!



There's a video of the bird here.



More stints! Here's a bird showing quite obvious chestnut fringes to the longest two tertials. So - is it a Little? While Little Stints in breeding plumage do have chestnut fringes to the tertials, Red-necked can frequently show chestnut fringes to these feathers as well, and even to some inner greater coverts. Chestnut fringes to the outer greater coverts, and to the median and lessers is diagnostic of Little (cf Red-necked). What can be seen of the inner greater coverts on this bird reveals rather inconclusive greyish fringes. Structurally, the long body, large squarish head and short, straight bill all favour Red-necked (which is what it is).



What about this one? In addition to the tertials and inner greater coverts showing chestnut fringes, the visible median and lesser coverts are also chestnut-fringed, so this is the Real McCoy!



And this? The colder, darker tones should tell you that it's neither Red-necked nor Little, nor even a stint, but a Broad-billed Sandpiper!





A nice comparison of plumage and structure.





I could only find two Little Stints today.







A few shots showing the difference in bill structure: Little's bill is less deep-based, thinner and finer-tipped than Red-necked's.





A couple more shots of the duller bird.



And the brighter one, showing all you need to make a positive id!

A couple of clips, showing each bird, here and here.





Two Painted Storks put in an appearance from time to time. This was the brighter of the two birds. These are assumed to be dispersants from the full-winged feral colony which has spread outward from Zoo Negara in KL.

Friday, April 15, 2011

21 March 2011 (afternoon) Part 1: Kapar Power Station, Selangor

Still not sure how to narrate an account of an amazing afternoon.























Just over 19,000 birds, most of which were crammed into one rather small ashpond! Here's what it looked like:



Birds were frequently disturbed by overflying Brahminy Kites, allowing lots of opportunities for flight shots, even though they were usually quite distant.



This is what a raptor sees when it flushes the birds - a highly disorientating swirl of flickering patterns and colours, which is just the way the waders want it!



Not to mention the roar of thousands of wings!





The birds head for the open sea, but stay as low as possible, just clearing the perimeter fence and then diving below the level of the mangrove trees to make it difficult for a raptor like a Peregrine to make a strike.





When put up by a raptor, the birds leave in a mad rush all together, but their return a few moments later is a more leisurely affair. Out at sea, they split up into smaller flocks of similar species. A couple of groups of Bar-tailed Godwits and Great Knots planing in.



More Bar-tails.



A Bar-tailed Godwit adds a splash of colour to the monochrome Great Knot flock. There are a few Red-necked Stints in the foreground.



I enjoyed the patterns created by the knot flock heading straight toward me. Apart from Great Knots, you should be able to find a few Red Knots, Bar-tailed Godwits and Grey Plovers in this lot.



More knot high-jinks!



Great and Red Knots, and Grey Plovers.



With so many birds, it's very easy to miss things, which is why scrutinizing my photos afterwards is a worthwhile exercise. A Shanghai leg-flagged Great Knot (black over white), not noticed at all on the day!



In flight, the old, faded brown remiges of last year's juveniles (now in 'first summer' plumage) contrast obviously with the fresh black wing and tail feathers of the adults, which underwent a full moult at the end of last year. There are two Red Knots in amongst the Greats here.



A nice comparison of godwits - the gleaming white underwing of the Black-tails and the duller barred underwing of the Bar-tails. The difference in leg length is also striking when the birds are in flight. In Europe, Black-tailed Godwits are larger and longer-billed than Bar-tails; here it's the other way round!



Bar-tailed Godwits here are Whimbrel-sized!






















Or maybe the Whimbrels are Bar-tailed Godwit-sized!



The black armpits of the Grey Plovers stand out in this mixed flock.



Moving down the size scale - a mixed flock of Lesser Sand Plovers and Curlew Sandpipers arriving, with two Broad-billed Sandpipers and a single Greater Sand Plover for you to find!



Red-necked Stints, Broad-billed Sandpipers, Curlew Sandpipers, Lesser Sand Plovers and, again, a single Greater Sand.



A nice selection of underwings! I really wanted to catch the Nordmanns' Greenshanks (centre) in take-off mode, but they were more laid back than the other species!



At last one obliged! For good measure, a Common Greenshank (left) took off at the same moment, giving a nice comparison of the underwings. Also in this photo: Grey Plover, Great and Red Knot, Common Redshank and Bar-tailed Godwit.



Not brilliantly sharp, but a glisteningly white-underwinged 'Nodshank' to finish off this post. Many more pics to follow shortly!