White-collared Swift vs Lesser Swallow-tailed Swift

In short

The White-collared Swift and the Lesser Swallow-tailed Swift are both large, dark swifts with distinctive white markings, but they differ notably in size and tail shape. The White-collared Swift is significantly larger with a broad, white collar, while the Lesser Swallow-tailed Swift is smaller with a deeply forked tail.

Identification tips

1. Size: Look for the larger size of the White-collared Swift. 2. Tail Shape: The Lesser Swallow-tailed Swift has a deeply forked tail, unlike the slightly forked tail of the White-collared Swift. 3. White Markings: Note the broad white collar of the White-collared Swift compared to the additional white rump patches of the Lesser Swallow-tailed Swift. 4. Flock Size: Observe flock size; White-collared Swifts are often in larger flocks.

Size

The White-collared Swift is much larger than the Lesser Swallow-tailed Swift, making size a reliable field mark.

Plumage

Both species have dark plumage with white markings. The White-collared Swift has a broad white collar, while the Lesser Swallow-tailed Swift features a white collar and additional white patches on the rump sides.

Behaviour

White-collared Swifts are often seen in large flocks, sometimes mixed with other swift species. Lesser Swallow-tailed Swifts are typically observed in smaller groups or pairs.

Habitat

White-collared Swifts are found in montane and submontane forests, often at higher altitudes. Lesser Swallow-tailed Swifts prefer lowland forests and are more likely to be seen at lower elevations.