White-rumped Swiftlet
Aerodramus spodiopygius
A small, mostly gray swiftlet, paler beneath with a pale throat and darker cap. White rump varies from white to pale gray. Occurs over a wide range of habitats up to 1900 meters of elevation. Similar to both Uniform Swiftlet and Mayr’s Swiftlet, but smaller, with a paler rump. Main call is a pleasant twitter, “twee-twee-chew-chew.”
Taxonomy
- Scientific name
- Aerodramus spodiopygius
- Authority
- (Peale, 1849)
- Order
- Apodiformes
- Family
- Apodidae
- Genus
- Aerodramus
Range and habitat
- Migration
- Resident species
Conservation
- Population trend
- stable
Photos
Distribution
Other Birds

Bornean Frogmouth
Batrachostomus mixtus
Small stout frogmouth with a face full of wispy whiskers. Males are dark brown overall; females are bright rufous. Restricted to Borneo’s central and southern mountain ranges, where it inhabits foothill and lower montane forest. Similarly-sized Sunda Frogmouth mostly found in lowland forest. Blyth’s Frogmouth is proportionally longer-tailed, with stronger white markings on the wings and underparts. Vocalizations vary and are poorly understood; frequently gives a mournful descending whistle and a fluid, rippling, downslurred trill.

Helmeted Curassow
Pauxi pauxi
Large and unmistakable black curassow with a blue-gray helmet on forehead, red bill and legs, white belly, and white tipped tail. Males and most females similar, but some females are of a brown and barred morph. Generally rare in mature montane forest from low to medium elevations. Often in pairs or small groups walking on the forest floor, foraging on fruits and seeds; when alarmed flies to the upper level of the forest, sometimes calling in alarm and other times staying quiet. Vocal during the breeding season; song is a deep, low pitched series of “uhm…UUUUHm…uuuhm;” alarm call is a deep and dry sneezing sound. No similar species in range.

Yellow-billed Egret
Ardea brachyrhyncha
A stocky egret that is larger than Western Cattle and Little Egrets, but smaller than the Great Egret. Often confusing and difficult to identify, this bird is truly intermediate between potential confusion species. Things to look for include a yellow bill (brighter during breeding season) that is shorter than Great Egret but longer than Cattle Egret, a relatively rounded head, and shorter legs than Great Egret, approaching Cattle Egret. Like most egret species, associates with all types of water bodies including wet fields, often flocking with other egrets.
Start Your Bird Watching Journey
Identify a bird outdoors and keep the field guide close for your next observation.