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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 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 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 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 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 lesser nighthawk (Chordeiles acutipennis) is a nightjar found throughout a large part of the Americas. This bird looks similar to the common nighthawk but is slightly smaller, has a slightly less deeply forked tail, and is more buffy in coloration.
A nesting Philippine nightjar. Ebird describes it as "A medium-sized night bird of forest and open areas from the lowlands to the mountains. Heavily patterned in various shades of brown, with finely barred underparts, blotching on the chest, and dark wings with large pinkish and white spots and a broad pale bar bordered with black.
The birds are attracted by insects around domestic animals and, as unusual nocturnal creatures, were then blamed for any misfortune that befell the beast. [ 17 ] [ 34 ] Another old name, "puckeridge", was used to refer to both the bird and a disease of farm animals, [ 47 ] the latter actually caused by botfly larvae under the skin. [ 48 ] "