Jerdon's nightjar
| Jerdon's nightjar | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Caprimulgiformes |
| Family: | Caprimulgidae |
| Genus: | Caprimulgus |
| Species: | C. atripennis |
| Binomial name | |
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Caprimulgus atripennis Jerdon, 1845 |
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Jerdon's nightjar (Caprimulgus atripennis) is a medium-sized nightjar species which is found in southern India and Sri Lanka. Formerly considered as a subspecies of the long-tailed nightjar it is best recognized by its distinctive call. The common name commemorates the surgeon-naturalist Thomas C. Jerdon who described the species although it was also referred to in the past as the Ghat nightjar on account of its habitat.
Thomas C. Jerdon first described this species in an annotation to his 1845 treatment of the jungle nightjar (C. indicus) in the Illustrations of Indian ornithology. Subsequently, it was sometimes lumped again with C. macrurus, but the co-occurrence of this form and large-tailed nightjar C. macrurus without interbreeding in the northeast of the Indian peninsula was noted in 1987 suggesting their distinctness. It has since been reaffirmed by studies on vocalization and considered a full species. The subspecies in Sri Lanka is C. a. aequabilis. Jerdon's type locality mentioned as Ghauts has been considered to be the Eastern Ghats west of Nellore.
Like other nightjars, it has a wide gape, long wings, soft downy plumage and nocturnal habits. At 26 cm in overall length, it is almost a head's length larger than the Indian nightjar (C. asiaticus), and differs from that species in its barred tail, rufous rear neck, and wing bars. The male has a white patch on each wing. Otherwise, their cryptic plumage is mainly variegated buff and brown, as typical for the dark tropical woodland nightjars. This has an unbroken white gorget like the long-tailed nightjar but the tail is shorter. The Sri Lankan aequabilis is slightly smaller and darker.
Its typical call is a fast repetitive ch-woo-woo. Another call is said to be a frog-like croak.
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Wikipedia