Large-tailed Nightjar vs Jerdon's Nightjar

In short

The Large-tailed Nightjar and Jerdon's Nightjar are both medium-sized nightjars with similar plumage patterns, making them challenging to distinguish. However, the Large-tailed Nightjar typically has a longer tail and more pronounced white markings on the wings and tail. Vocalizations differ significantly, with each species having distinct calls.

Identification tips

1. Look for the longer tail and more pronounced white wing and tail markings on the Large-tailed Nightjar. 2. Listen for vocalizations: the mechanical call of the Large-tailed Nightjar versus the varied notes of Jerdon's Nightjar. 3. Consider habitat: Large-tailed Nightjar is more adaptable, while Jerdon's Nightjar prefers drier areas. 4. Use size and tail length as a guide when both species are present.

Size

The Large-tailed Nightjar generally has a longer tail compared to Jerdon's Nightjar, which can be a useful size distinction in the field.

Plumage

Both species have cryptic plumage with mottled brown and gray patterns. The Large-tailed Nightjar often shows more prominent white markings on the wings and tail, whereas Jerdon's Nightjar tends to have less conspicuous white in these areas.

Behaviour

Both species exhibit similar nocturnal behavior, often seen hawking for insects at dusk and dawn. They are ground-nesters and rely on camouflage for protection.

Habitat

Both species inhabit open forests, scrublands, and clearings, but the Large-tailed Nightjar is more widespread and can be found in a variety of habitats across its range. Jerdon's Nightjar is more localized, often found in drier regions.

Voice

The vocalizations are distinct: the Large-tailed Nightjar has a repetitive, mechanical 'chonk-chonk-chonk' call, while Jerdon's Nightjar produces a more varied and softer series of notes. Listening for these calls is one of the most reliable ways to differentiate them.