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C. a. aequabilis Sri Lanka. Jerdon's nightjar (Caprimulgus atripennis) is a medium-sized nightjar species native to southern India and Sri Lanka.Formerly considered as a subspecies of the long-tailed nightjar, it is best recognized by its distinctive call which sounds like a wooden plank being beaten periodically with each note ending in a quaver. [2]
The level of divergence is the highest of any genus of birds, being more typical of the divergence between genera or even families. The northern potoo was for a long time considered to be the same species as the common potoo , but the two species have now been separated on the basis of their calls .
The Bird Banding Laboratory codes first appeared in published form in 1978, [1] and their use gradually spread from bird banders to ornithologists and birdwatchers. The Institute for Bird Populations codes were created in 2003 [2] with the goal of addressing shortcomings of the BBL codes: The BBL codes omit some birds, notably Galliformes. The ...
Breeding has been recorded as typically February to August, but depending on the portion of this bird's range breeding birds can be met with almost year-round. [11] The nest is a slight depression on a thick tree branch, [ 12 ] at least 10 m (33 ft) above ground, with a single white (slightly spotted) egg measuring about 5.2 cm × 3.8 cm (2.0 ...
Like other nightjars they are nocturnal, active at dusk and at night. [8] They have a distinctive call which includes a sharp tsiik followed by a pause and a two-syllable ba-haaww . Painting by Elizabeth Gwillim c. 1801
The common nighthawk is distinguished from other caprimulguids by its forked tail (includes a white bar in males); its long, unbarred, pointed wings with distinctive white patches; its lack of rictal bristles, and the key identifier – their unmistakable calls. [13] These birds range from 21 to 25 cm (8.3 to 9.8 in) in total length and from 51 ...
The 30-second video shows a bird in a tree, which isn't very interesting until you turn your sound on and listen to the bird. It sounds just like a real siren and had everybody fooled! Isn't it ...
Crepuscular, a classification of animals that are active primarily during twilight, making them similar to nocturnal animals. Diurnality, plant or animal behavior characterized by activity during the day and sleeping at night. Cathemeral, a classification of organisms with sporadic and random intervals of activity during the day or night.