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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.
The tail is dark with white barring; the underparts are white with black bars. The adult male has a white throat; the female has a light brown throat. The most distinguishing characteristic to determine its identity from its closest relative the common nighthawk are the contrasting pale tertials near the back of the wings of a sitting bird ...
The eyes are large, even larger than those of nightjars. As in many species of nocturnal birds, they reflect the light of flashlights. [14] Their eyes, which could be conspicuous to potential predators during the day, have unusual slits in the lids, [15] which allow potoos to sense movement even when their eyes are closed.
The common nighthawk or bullbat (Chordeiles minor) is a medium-sized [3] [4] crepuscular or nocturnal bird [3] [5] of the Americas within the nightjar (Caprimulgidae) family, whose presence and identity are best revealed by its vocalization.
The Egyptian nightjar (Caprimulgus aegyptius) is a medium-small nightjar which occurs in south west Asia and north Africa and winters in tropical Africa. This is a fairly common species with a wide distribution which faces no obvious threats apart from habitat destruction, so the International Union for Conservation of Nature has rated its conservation status as being of "least concern".
The common name "nightjar", first recorded in 1630, refers to the nocturnal habits of the bird, the second part of the name deriving from the distinctive churring song. [1] Caprimulgus nightjars are found around Afro-Eurasia and Australasia, and like other nightjars they usually nest on the ground. They are mostly active in the late evening and ...
The threat call of the bird is a rok sound and is used when in aggregations. [10] Nankeen night heron chicks are described to beg with a kak-kakkak call in their first two weeks, in order to obtain the attention of their parents for feeding.
The common name "nightjar", first recorded in 1630, refers to the nocturnal habits of the bird, the second part of the name deriving from the distinctive churring song. [ 3 ] There are two subspecies : nominate ruficollis , breeding in Iberia , and desertorum breeding in North Africa .
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