Australian Swiftlet vs Edible-nest Swiftlet

Australian Swiftlet

Aerodramus terraereginae

Tiny12 gGrassland

It is 11–12 centimetres (4.3–4.7 in) long with a wing length of 107–118.2 millimetres (4.21–4.65 in) and a weight of 10.5–12.5 grams (0.37–0.44 oz). The upperparts are dark grey-brown while the underparts are a uniform greyish. There are pale feathers on the forehead and lores. The rump is normally pale greyish but can occasionally be darker. The tail is slightly forked. The form chillagoensis is smaller and paler with a weight of around 9.39 grams (0.33 oz). It has a high-pitched flight call. In its breeding caves, it utters a metallic clicking call, used for echolocation.

ID text from Wikipedia, CC BY-SA 4.0

Photo: Donald Davesne · CC BY 4.0

Edible-nest Swiftlet

Aerodramus fuciphagus

Tiny11 gForest

The edible-nest swiftlet, generally with a body length of 14 cm (5.5 in), is a medium-sized representative of the salanganes. The upper part of the slender body is blackish-brown; the under part of the body ranges in colour from white to blackish-brown. The tail is short and has a slight notch. The bill and feet are black. Legs are very short and tarsi are usually unfeathered or lightly feathered. It weighs 15 to 18 g (0.53 to 0.63 oz) and the wings are long and narrow. In flight the swept-back wings resemble a crescent.

ID text from Wikipedia, CC BY-SA 4.0

Photo: sucker69420 · CC BY 4.0

Photos and recordings are credited to their authors under the licence shown. Full profiles: Australian Swiftlet and Edible-nest Swiftlet.