Showing posts with label dollarbird. Show all posts
Showing posts with label dollarbird. Show all posts

Sunday, March 14, 2010

13th March 2010: Pulau Burung, mainland Penang

I was at the Red-throated Thrush site at dawn to see what would hop up onto the dead trees.



The first thing to attract my attention was a group of three Asian Koels, one of which was holding a feather. No idea what they were up to!



Next up was a preening Lineated Barbet.





Then I spotted a Banded Woodpecker sunning itself at the top of a dead tree.
























Later on it went down the trunk and started excavating a hole.





A Dollarbird was an interested bystander!



Along the coastal bund, the female Common Kingfisher had successfully caught...something - not sure what.

Being a Saturday morning, the Landfill site was fairly crawling with bird photographers in cars. I went past one carload photographing White-browed Crakes and a Lesser Whistling-Duck with ducklings - hope they got some nice pics!










































Even though they are a common bird, I couldn't ignore the Blue-tailed Bee-eaters in the golden early morning light. Stunning!



There are so many birds at Pulau Burung, and they are very habituated to people in cars, with the result that you sometimes encounter an unusual problem for photography - bird too close! This Slaty-breasted Rail was a good example.

The same was true of snipes. I was very keen to photograph some, but they were mainly on the grass verge besiede the road, and so flushed before I realized they were there. At last though, I got lucky.



A Pintail/Swinhoe's feeding out in the open only metres away!





The dull buff edge on both sides of the lower scapulars, and the barred median coverts showed that this was one of the Pintail/Swinhoe's pair, and not a Common Snipe. The problem was, which one?!





The large, squarish head, with the eye set well back favoured Swinhoe's, as did the thickish yellow legs (covered with greyish grime), but I knew I would need to see the outer tail feathers to be able to identify the bird for certain.



This is a sketch of three snipe species' tails from Paul Leader and Geoff Carey's paper on the 'Identification of Pintail Snipe and Swinhoe's Snipe' from British Birds. The dark grey-filled feather is (roughly) at the centre of the tail, so the picture shows only the left side fanned open.The blue-filled outer feathers are the important ones for identification. On Common Snipe, these are similar in breadth and shape to the other tail feathers. On Swinhoe's, the outer feathers become progressively narrower toward the outside, while on Pintail, the outer feathers become abruptly very narrow and pin-like, without much gradation from broad to narrow.

There are usually two chances to see snipe outer tail feathers in the field. One is when they engage in territorial disputes with other birds, when they will fan and raise their tails. The other is when they preen.




I watched this bird for over two hours, and it only preened the tail briefly twice in that time! This was the first occasion...



...And this was the second. On neither did the bird fully fan the tail. Nonetheless, on the first photo, you can see the tips of the undersides of many of the tail feathers.



The feathers on the left side appear to become gradually narrower, fitting the Swinhoe's pattern.

The second picture reveals that the tips of the upperside of the central tail feathers are white. Leader and Carey state, "The central rectrices of Swinhoe’s Snipe may also be conspicuously tipped pale, often white, unlike Pintail," so this seems to be another pro-Swinhoe's feature.



Although not useful for identification purposes, it was interesting to see that the tertials on either side of the bird were at different stages of moult. On the right side, the upper two tertials were new and still growing, while the lowermost one was old and retained very little patterning. On the left side, all the tertials were old and unmoulted.





A couple more pictures of the bird after it had climbed up onto the bund next to the road.

With the bird sitting so close to the road it was only a matter of time before it was flushed, so I had my sound recorder on in the hope of recording the flight call. When it was finally flushed, however, it was completely silent! Leader and Carey say that "When flushed, Swinhoe’s Snipe calls less frequently than Pintail Snipe, and a flushed snipe which is silent is most likely to be the former." However, I am always wary of arguing from silence!







The very short toe projection beyond the tail tip is another pro-Swinhoe's feature which Leader and Carey indicate might be valid. Check out the short toe projection on this vagrant Swinhoe's Snipe in Finland.



Another view of the outer tail on the bird in flight, though probably not conclusive on its own.



My four best shots of the tail!

Wells states that, on the evidence of the analysis of hunting-bags in the 1940s and 50s, Pintail Snipe is overwhelmingly the commonest of the three snipe species in the Peninsula (97 - 99+% of all shot birds analyzed were Pintail). This contrasts with my own admittedly meagre sample; all Pintail/Swinhoe's Snipes I have identified to species this season have been Swinhoe's. Wells suggests that one potential bias in the analysis results is the "partitioning of winter habitats between species, relative to those most often shot over," with the suggestion that Pintail prefers drier, harder substrates than Common and Swinhoe's. In the same way that hunters might prefer to shoot in drier habitats, birders tend to prefer birding in wetter habitats, or at least, it may be true that birds are easier to observe in the open when there is open water. Whatever the case, it may be dangerous to assume that Pintail/Swinhoe's Snipes are 'most likely to be Pintail' based simply on past data.

Thursday, February 25, 2010

25th February 2010: Pulau Burung, mainland Penang

I took the morning off to go look for a Red-throated Thrush that was photographed recently at one of my old stamping grounds, Pulau Burung.

The place where the bird was seen looks like an excellent place for one to hide, but you'd have to be very lucky to see it, even if the bird is still there, as the cover is very dense. Plenty of other birds there though!



A male Pink-necked Green Pigeon enjoying the early morning sun.






















A female Common Flameback doing an impression of a Wryneck!






















You can just about see how they get their name!






















One of several Dollarbirds. They all looked this colour - must be the early morning light (normally they look bluer than this).





Overhead, I couldn't resist trying to snap the swiftlets, which I assume are Germain's.

Having given up on the thrush, I went to the pools, where my main target was snipes.



Snipes are easy to see close here! But not always so easy to see out in the open. I watched this Swinhoe's or Pintail Snipe for ages as it sat within a few metres of me, but I never got a clear view of the outer tail feathers, so had to leave it unidentified.







The same bird after it decided that maybe I was too close!



Another Pintail/Swinhoe's, also hiding its rear end from me!



However, I got lucky with this one, because it started to preen, and eventually gave me a glimpse of the outer tail.
















These two feathers show that the bird is a Swinhoe's Snipe. If it were a Pintail, these feathers would be much more needle-like.

In the wetter part of the ponds I came across a Common Snipe for comparison.







Apparently, my explanation of how to tell Common and Pintail/Swinhoe's apart on the ground a few posts back was confusing for some. I'll try to clarify here.



1. The pattern of the scapulars, especially the lower scapulars (red arrows). On Common, only the outer web of each feather has a broad pale edge. The inner edge is much duller. This makes the overall scapular pattern look like a series of pale diagonal streaks on a dark background.

On Pintail and Swinhoes, the buff edge goes right round each feather, so the pattern is a series of scales rather than streaks. Because the background is not so dark, these stand out less than the outer web streaks on Common Snipe.

2. The pattern of the coverts (blue arrows). Adult Common Snipes' coverts have whitish tips. From a distance, this gives the impression of indistinct wingbars (see the series of Common Snipe pics above). Adult Pintail and Swinhoe's have evenly barred coverts, without paler tips, presenting a rather uniform barred wing pattern.

The other birds seen today were all Pulau Burung regulars, except for a Chestnut-winged Cuckoo that flew across the road in front of me.





Little Grebes seem to be increasing in numbers.



Lesser Whistling Ducks certainly are. I wonder how long before a migrant duck drops in to join them?



The pond-herons are beginning to get their breeding plumage. The fresh milky tea feathers on the head and the new blackish scapulars reveal that this is a Javan.

Some flight shots of common birds:



Whiskered Tern.



White-winged Tern.



Wood Sandpiper.



White-browed Crake.





These put on a good show today!



Blue-tailed Bee-eater.











Oriental Pratincole. The last shot shows the diagnostic tail pattern compared to Collared Pratincole. The outermost tail feathers of Oriental have very little black on them compared to Collared, which are black for roughly half their length. See here.









Savanna Nightjar. I came across a communal roost of five birds.










































I finally got my chance to photograph a Common Kingfisher in good light today. If anything, the light was a bit too harsh!