New Barn Swallow race in Borneo ?

Barn Swallow Hirundo rustica, occurs almost globally, is an abundant winter visitor to Borneo, recorded over all habitats from sea level to mountain peaks, and from offshore islands.

Some birds in Borneo during the winter months are in moulting plumage without their diagnostic long tail streamers, they can look similar to juvenile/immature birds in this plumage.

Here are some images of either moulting birds or juvenile birds, I am not sure, they may be all immature birds.

 

Here is how the adult should look like when not in moult, with its diagnostic breast-band and tail streamers.

The race usually recorded in Borneo is H. r. gutturalis, all the above birds should belong to this race, it occurs across China, Taiwan, Japan, Korea Kuril Island and lower Amur river.

H. r. tyleri,  another race which mainly breeds in South Central Siberia, Mongolia and North East China has been recorded in Myanmar, Thailand and Peninsular Malaysia. This race has dusky brick orange over its entire underparts compare to whitish or buffish underparts of the gutturalis race. This race has not been documented in Borneo as yet as it is not mentioned in Smythies, Mann, Phillipps and Myers in their respective publications.

The following bird photographed in Tawau is evidently from the race tyleri by virtue of its distinctive underparts coloring. It could be a regular visitor here, but due to its abundance, it could have been overlooked by most birders.

Edited to add: Thanks to Dave B., who raised the point on the races of satuata and  mandschurica. This might very well be the former, but the the two races might not be always separable.

Happy birding.

Photodocument of Wild Birds of Borneo

Standard References for my blog

Chestnut-cheeked Starling

Chestnut-cheeked Starling Sturnus philippensis, a very local winter visitor to Borneo, usually flock with Asian Glossy Starling Aplonis panayensis.

Its appearance in Borneo is somewhat irregular, not seen in some years, while large flocks were seen roosting in other years, however, it is a very regular visitor to the Philippines,

It breeds in Japan, from Central Honshu to Hokkaido, South Sakhalin and South Kuril Island from April to October, winters in Southeast Asia and the Philippines.

These images of this species were taken near Rainforest Discovery Centre, Sepilok, Sandakan in October (My new bird). They were seen flocking with a flock of Asian Glossy Starling.

 

Happy birding.

Photodocument of Wild Birds of Borneo

Standard References for my blog

Bornean Short Python

Bornean Short Python or Short-tailed Python Python breitensteini is a small python, grows to 2 meters, inhibits edges of waterbodies, such as sluggish rivers, swamps and marshes in lowland tropical forests, where they ambush small mammals and birds.

Chinese call this Piglet Python as it looks fat and short, resembling a piglet, against the long Reticulated Python Python reticulatus, which grows to 10 meters in length.

It is endemic to Borneo and known from Sabah, Sarawak, Brunei and Kalimantan.

We encountered this beauty when we were photographing birds, it was crossing the access road, slowly and steadily.

Happy birding.

Photodocument of Wild Birds of Borneo

Standard References for my blog