Tuesday, October 28, 2008

24th October 2008, Lok Kawi Beach, KK, Sabah

During the Wader Workshop we had several opportunities to watch some species which are rare or unusual in the Peninsula, such as Grey-tailed Tattler, Chinese Egret and Common Ringed Plover. On my last afternoon I wanted to try to photograph these birds if possible, so headed back to Lok Kawi beach. Unfortunately the weather was against me, as the skies got darker and darker, eventually culminating in a downpour that would last 12 hours or more. The pics below are a combination of some taken on 19th Oct (in perfect early morning sunlight) and the 24th (in miserable light and weather). You'll easily spot which is which!

Here's a nice adult Grey-tailed Tattler. This was the commonest 'sandpiper' during our wader workshop, making a nice change from Redshanks!

Grey-tailed Tattlers are extremely similar in non-breeding plumage to Wandering Tattlers, which, however, follow a much more easterly migration route, and have never been recorded in Borneo or South-east Asia.

Just for the record, Grey-tailed may be told from Wandering, according to the books, by:

1. Grey-brown rather than dark slate upperparts - check.
2. Primary tips falling level with tail as opposed to extending beyond tail - check.
3. Nasal groove barely half bill length, as opposed to extending well beyond mid-point - hmm - this seems rather longer than half way along.
4. Supercilium extends some way behind eye, as opposed to stopping at eye - OK.
5. Largely white rear flanks, as opposed to slate grey rear flanks - check.
6. Should show 3-4 primary tips beyond tertials, as opposed to 4-5 - I can barely make out 2 primary tips beyond the tertials on this bird - but then the outer primaries are unmoulted and worn.
7. Call should be a rising "tu-eet", or a soft "tuu tuu tuu" anxiety call, as opposed to a "plaintive rippling trill of 6-10 'pu-tu-tu-tu-tu-tu-tu' notes, like a subdued Whimbrel". This bird gave a soft 'wee-wee-weep' call when taking flight.

These flight shots show the wing moult more clearly. The outer three primaries and inner three secondaries are worn and unmoulted, while the remainder of the flight feathers have been recently replaced. Primary moult goes from the innermost to the outermost, while secondary moult travels in the opposite direction.

Here's a juvenile bird moulting into first winter plumage. The white-flecked wing coverts and scapulars are worn juvenile feathers. Notice how much smaller juvenile feathers are than adults', especially scapulars and tertials. As a consequence of the tertials being smaller, 5 primary tips fall beyond the tip of the tertials - whoops, that shouldn't happen according to the books! Those pale-tipped upper tail coverts are another good pointer for Grey-tailed though.

Not sure how good a field feature this is, but I noticed that the tattlers would always raise their wings momentarily on landing.

From one tricky pair to another - the sand plovers. On the deck, they're not too difficult when seen close up. Here's a Greater in front with a Lesser behind.

But what about in flight?

Again, according to the books, Greater (the top bird in this composite):

1. Has a longer toe projection beyond the tail tip - err - nope!
2. A less prominent white wing bar across the inner wing - no again.
3. The wingbar 'bulges' more on the inner primaries - can't see it myself.
4. The tail has a dark subterminal bar - wellll - maybe...
5. Shows more white on the tip and sides of the tail - possibly, but marginal!

This one shows a Greater on the left. The toes project fractionally longer beyond the tail on this bird, but you'd be doing well to be sure of the difference in the field.

The Greater is again on the left here. Maybe the Lesser shows a clearer white secondary bar, but it seems to me that if you are getting good enough views to judge things like toe projection, wingbar shape and strength, etc, you'd be better off looking at the bill proportions, which, to my mind, are the easiest way to tell the birds apart. I also think that Greater shows a more rakish body shape, with more 'tail' behind the wings and 'head' in front of the wings than Lesser.

Ah - this is a bit easier! A Pacific Golden Plover in front of a Lesser Sand Plover.

Moving from waders to egrets - these Little Egrets look like a stop-motion picture as they come into roost at high tide.

One of my goals for this trip was to be able to see white morph Pacific Reef Egret, and to be able to compare it with Chinese Egret. Despite the rarity of Chinese globally, I have seen far fewer white morph Pacific Reef than Chinese. For some reason, the white morph is much rarer than the grey morph, and seems to be commoner in areas where sandy beaches predominate.

We saw several of these grey morph birds, but this particular one was paired with a white morph!

Very nice!

It still had most of its breeding plumes, as this pictures shows.

From time to time, it would launch itself into deeper water,

hovering or treading water...

...before diving in after its prey!

We saw several Chinese Egrets during the workshop, when I didn't have the camera with me! In the last few hours of daylight on my last day, I was determined to track one down to get some comparison photos with the white morph Pacific Reef. I managed it, though the light conditions weren't the best!

Photographed from under an umbrella!

I would recommend a read of this paper on separating Chinese from white morph Pacific Reef Egret, published in the OBC bulletin a few years ago. I would say that it is a pretty accurate summary of the key differences.

In all the following composites, Pacific Reef is above and Chinese below. Pacific Reef looks a much 'better fed' and well-built bird compared to the rather 'skinny' Chinese. The differences in bill proportions and leg, especially tarsus, length are also obvious here.

Even at a distance these differences are fairly obvious, though somewhat subjective. This particular Pacific Reef had bright orange soles to the feet, while all the Chinese seen had greenish-yellow soles. Notice also the Pacific Reef Egret's thick tibio-tarsal joints.

Bare part colouration may be variable according to season and individual, although Chinese in the non-breeding season do seem to show a fairly consistent bill pattern - largely yellow lower mandible and a yellow cutting edge of the base of the upper mandible.

But the bill structure and shape of the loral skin make for two very different-looking birds. The loral skin of Pacific Reef is very deep (top to bottom) and seems to go over the forehead. Below the eye, it extends in a quite obtusely angled triangle, whereas the same area is smaller and rounder on Chinese. The top line of the loral skin can be quite similar at certain angles, though Chinese has a more pronounced dip just in front of the eye.

Pacific Reef's bill is broad-based, tapering gradually to the tip, which is rather blunt, with the upper mandible overlapping the lower slightly. Chinese has a thinner, more parallel-sided bill that ends in a sharp, dagger-like point.

Chinese has quite a pronounced peak at the rear of the crown, whereas Pacific Reef's headshape is more flat-crowned.

The tarsus of Pacific Reef seems thick and short, while on Chinese Egret it seems better proportioned with the rest of the body.

The subtle differences in loral skin and bill shape described above, in combination, create two very different 'face patterns'.

The lower picture of the Chinese Egret was one of the last I took before the heavens truly opened on my last evening in Sabah. It was a memorable trip for me. Thanks to everyone who helped organize and who took part in the Wader Workshop. I hope it was as worthwhile an experience for you as it was for me!

24th October 2008, Mount Kinabalu HQ, Sabah

My last morning at the Park was spent up at the power station, trying to see the Fruithunter. I heard it a couple of times, but couldn't see it, so there's something to go back for!

Some of the other birds I saw while looking for the Fruithunter:

A Bornean Whistler

Another Bornean Whistling Thrush.

A Golden-naped Barbet.

There were a couple of White-browed Shrike Babblers singing.

A lousy pic but a good record! Not sure how many Yellow-browed (Inornate) Warblers have been recorded in Borneo, but it's not listed as having occurred in McKinnon. This one was calling and moving actively around the trees near the power station.

This Rajah Brooke's Birdwing put on quite a show at the entrance to the Pandanus trail.

At one point, it almost became breakfast for a White-crowned Forktail, which would have been a shame for such a magnificent beast.

A last walk along the Silau-silau trail produced a pair of Snowy-browed Flycatchers.

Monday, October 27, 2008

23rd October 2008, Poring Hot Springs, Sabah

I made the 45 minutes or so drive from the Park HQ down to Poring Hot Springs, arriving at first light, in the hope of seeing the Blue-banded Pitta that had been seen the previous day by Jason Bugay Reyes and Troy Shortell.

At first light, a few Waterfall Swifts were flying over the car park, but my camera steamed up because of the change in humidity and temperature from higher up the mountain, so I wasn't able to get any pictures, and they cleared off as soon as it became properly light.

This enormous beetle was lying dead at the entrance; not sure what species it is.

I took the trail to the Langanan Waterfall, encountering a good selection of forest species as I did so. White-tailed Flycatchers seemed to be singing everywhere, but were extremely difficult to see.

At the ridge above the bat caves I heard two pittas calling, so sat down and tried to whistle them in. After about 45 minutes, I was rewarded by the sight of both birds hopping onto the trail in the ravine below me.

This could be the worst ever picture of Blue-banded Pitta, but perhaps the only one ever taken of two birds together! A better idea of what they look like can be found here.

While waiting for the pittas, this juv Dark-throated Oriole came to check me out.

Just above the ridge where I'd seen the Blue-banded Pittas, a Banded Pitta - the distinctive Bornean race - hopped up the trail in front of me.

A fruiting tree produced this Gold-whiskered Barbet - much brighter than Peninsular birds - but sadly, no sign of Hose's Broadbill.

On my way down the trail, I stopped to wait for the pittas again, but they were calling distantly and did not respond. Their absence was partly made up for by the presence of an extremely confiding female Rufous-collared Kingfisher.

The bird was clearly conscious of my presence, but appeared not to see me as a threat. I watched it for 2 hours at distances down to 10 feet!

I've managed to photograph males several times before, but this is the first time I've had chance to photograph the female. I think the scales on her back make her more attractive than the male.

Her strike rate wasn't that impressive. In two hours I saw her catch just two prey items - this caterpillar and a centipede.

I noticed that she herself was being 'preyed on' - by flies that appeared to be feeding on her eyes - yuck!

I wondered if she might have a go at this lizard, but in the end, she didn't see it.

Having such a long time to observe the bird, I experimented with different focal lengths. This was at 100mm, and I quite like the effect.

Time for a bit of a preen.

This was her reaction when a Crested Serpent Eagle was calling overhead. It reminded me of this

A final portrait of the Lovely Lady of Poring!

22nd October 2008, Mount Kinabalu HQ, Sabah

After the thrush, the trogon and the broadbill yesterday, today was always going to be a bit of an anti-climax! The Bukit Ular trail returned to its more normal form of graveyard-like stillness. Only this female trilobite beetle enlivened proceedings!

I spent some time at the Tempohon Gate, looking for a Black-breasted Fruithunter that had been seen there a couple of days previously.

This Bornean Whistling Thrush was hanging around the rubbish dump.

Here's a poor picture of the only Indigo Flycatcher I saw in four days!

I photographed these swiftlets at the bus shelter opposite the reception. A recent paper published in the BOC Bulletin describes a new species from the northern slopes of Mount Kinabalu, the Bornean Swiftlet (Collocalia dodgei). It has been split both from White-bellied (Glossy) and Cave Swiftlet. However, it is thought to occur alongside White-bellied, so separation cannot be done on range alone. Among the very subtle distinguishing features of 'dodgei' are smaller size, a greenish rather than bluish gloss to the upperparts, lack of whitish tail spots and lack of toe feathering! Well, I reckon these birds show a greenish gloss to the upperparts, but I can't say anything about the tail spots, size or toe feathering, so I'll just leave these as 'dodgy swiftlets'!

At around 4.40pm I entered the lower reaches of the Silau-silau trail from behind the Fitness Centre, and immediately came across three partridges making their way up from the stream and across the trail.

These proved to be Red-breasted Partridges, and they continued to feed in the thick undergrowth by the trail for the next half an hour.

Closer inspection revealed that the three birds were a pair with a juv, shown here.

Here's one of the adults.

A bit lower down the trail I came across this obliging Eye-browed Jungle Flycatcher.