American elk

Article

January 24, 2022

The Phalaenoptilus nuttallii is a nocturnal bird in the Caprimulgidae family that occurs on the North American continent from British Columbia and southeastern Alberta through the midwestern United States to northern Mexico. The habitat of the larvae are dry bushy and grassy areas, sometimes even stony deserted slopes of the desert type with a minimum of vegetation. It is the only representative of the genus Phalaenoptilus. Much of the northern bird population migrates to wintering grounds in central and western Mexico, but some birds live sedentarily and do not migrate. The American Stork is the only known bird that has been proven to fall into a torpor for a long time.

Taxonomy

The species was first formally described and directly illustrated in 1844 by French-American ornithologist John James Audubon based on a male specimen found on the east bank of the Missouri River between Fort Pierre and the mouth of the Cheyenne River in South Dakota. Audubon gave the bird the binomial name Caprimulgus nuttallii. The author chose the generic name nuttallii to honor his friend and ornithologist Thomas Nuttall. The species was moved to its own genus Phalaenoptilus by the American ornithologist Robert Ridgway in 1880. The genus name is a combination of ancient Greek phalainas, which means "moth", and ptilon, ie "plumage". Within the species, there are six subspecies: P. n. Nutalli (Audubon, 1844) - a nominate subspecies, mates in most of North America. P. n. Californicus Ridgway, 1887 - angl. dusky poorwhill (dark elk), darker and browner than the nominate subspecies. It occurs in Western California and in the northern Mexican state of Baja California. P. n. Hueyi Dickey, 1928 - eng. desert poorwhill, paler than the nominate subspecies. It occurs in southeastern California, southwestern Arizona and northeastern Baja California. P. n. Dickeyi Grinnell, 1928 - eng. San Ignacio poorwill (San Ignacio) is smaller with less pronounced sprinkling compared to subsp. californicus. It occurs in the southern part of Baja California. P. n. Adustus Van Rossem, 1941 - angl. Sonoran poorwill (Sonoran leopard) is paler and browner than the nominate subspecies. It occurs from southern Arizona to northern Mexico. P. n. Centralis Moore, RT, 1947 - occurs in central Mexico.

Description

With a height of 18 cm and a wingspan of about 30 cm, it is the smallest representative of North American squirrels. It weighs 36-58 grams. The plumage is gray-black with brownish sprinkles. The outer tail feathers are finished in white, which is slightly more pronounced in males. The front of the neck is white. The eyes are black and large, the legs short and black. Sexual dimorphism is indistinct. The woodpecker is well camouflaged when sitting in its typical habitat and resembles a dead leaf rather than an animal. .

Biology

Tok

Lelci is sonicated by a short pooh-i call that occurs from dusk to dawn. A third syllable lou can be heard in the immediate vicinity of the flowing bird, so the whole stream sounds something like pooh-i-lou. In flight, there is sometimes a short wait.

Torpor

The American Stingray is the only known species of bird that falls into long-term torpor to hibernation. During the torpor, the body temperature of the lizards drops from the usual 41 ° C to 18 ° C. The surface temperature of the body can drop below 3 ° C. California, Arizona and New Mexico), where the lizards spend most of the winter immobile in stone shelters. Such a long-term decline in life

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