Square-tailed Sawwing vs Black Sawwing

In short

The Square-tailed Sawwing and Black Sawwing are similar swallows with subtle differences. The most reliable field mark is the tail shape: Square-tailed Sawwing has a squared-off tail, while Black Sawwing's tail is slightly forked. Both species are predominantly black, making structural differences key for identification.

Identification tips

1. Tail Shape: Look for the squared-off tail of the Square-tailed Sawwing versus the slightly forked tail of the Black Sawwing. 2. Glossiness: In good light, the Square-tailed Sawwing may appear slightly glossier, but this is not a reliable mark. 3. Habitat Overlap: Both species can be found in similar habitats, so focus on structural differences rather than location.

Size

Both species are similar in size, typical of swallows, with no significant size difference noted.

Plumage

Both species have predominantly black plumage. The Square-tailed Sawwing may appear slightly more glossy, but this is not a reliable field mark due to lighting conditions.

Behaviour

Both species exhibit similar aerial feeding behaviors typical of swallows, making behavior an unreliable distinguishing factor.

Habitat

Both species inhabit open areas near forests or woodlands, often near water. They can be found in similar habitats, so location alone is not a reliable distinguishing factor.

Voice

Vocalizations are not well-documented for distinguishing these species, and they are generally similar.