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The Common nighthawk's trait of being a ground-nesting bird makes it particularly susceptible to predators, some of which include domestic cats, ravens, snakes, dogs, coyotes, falcons and owls. Lack of flat roofs, pesticides, [ 4 ] increased predation and loss of habitat [ 13 ] are noted factors of their decline.
The subfamily Chordeilinae contains four genera and ten species. [4] Under the genus Chordeiles exists the greatest number of diversity in species in the subfamily with the lesser nighthawk (Chordeiles acutipennis), the Antillean nighthawk (Chordeiles gundlachii), the common nighthawk (Chordeiles minor), the nacunda nighthawk (Chordeiles nacunda), the least nighthawk (Chordeiles pusillus), and ...
Species that live in the far north, such as the European nightjar or the common nighthawk, migrate southward with the onset of winter. Geolocators placed on European nightjars in southern England found they wintered in the south of the Democratic Republic of the Congo. [9] Other species make shorter migrations. [8]
Common nighthawk. Order: Caprimulgiformes Family: Caprimulgidae. Nightjars are medium-sized nocturnal birds that usually nest on the ground. They have long wings, short legs, and very short bills. Most have small feet, of little use for walking, and long pointed wings. Their soft plumage is cryptically colored to resemble bark or leaves.
The 2014 State of the Birds Report lists the nighthawk as a "common bird in steep decline." A leading hypothesis for the change in nighthawks is a decline in the insect population.
Crepuscular birds include the common nighthawk, barn owl, [19] owlet-nightjar, chimney swift, American woodcock, spotted crake, white-breasted waterhen, [20] European nightjars, [8] and common buzzards. [21] Many moths, beetles, flies, and other insects are crepuscular and vespertine.
Least nighthawk: northern South America Chordeiles rupestris: Sand-coloured nighthawk: Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela Chordeiles minor: Common nighthawk: South America to northern North America. Chordeiles acutipennis: Lesser nighthawk: United States through South America Chordeiles gundlachii: Antillean nighthawk
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