Plume-toed Swiftlet vs Black-nest Swiftlet

In short

The Plume-toed Swiftlet and Black-nest Swiftlet are both small, dark swifts with subtle differences. Plume-toed Swiftlet typically shows a paler rump, while the Black-nest Swiftlet has a more uniformly dark plumage. In flight, behavior and habitat preferences can also aid in distinguishing them.

Identification tips

• Look for the paler gray rump on the Plume-toed Swiftlet.
• Observe the habitat: Plume-toed Swiftlet may be seen in forested areas, while Black-nest Swiftlet is more associated with caves.
• Note the uniform dark plumage of the Black-nest Swiftlet, including the rump.
• Use behavior and flight patterns cautiously as they are similar in both species.

Size

Both species are similar in size, typical of small swiftlets, making size an unreliable differentiator.

Plumage

Plume-toed Swiftlet often has a paler gray rump, contrasting with its darker body, whereas the Black-nest Swiftlet has a more uniformly dark plumage, including the rump.

Behaviour

Both species exhibit similar swift-like flight patterns, characterized by rapid, agile movements. Behavioral differences are subtle and not reliable for identification.

Habitat

Plume-toed Swiftlet prefers areas with green cover from sea level to montane forests, while Black-nest Swiftlet is more often associated with caves and coastal areas for nesting.

Voice

Vocalizations are not a reliable field mark for distinguishing these species as they are similar and often difficult to discern in the field.