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A female snow bunting wintering atop Mount Agamenticus in York, ME. The snow bunting is a sexually dimorphic, medium-sized passerine bird. It is ground-dwelling, and walks, runs and can hop if needed. [7] It is fairly large and long-winged for a bunting. It measures 15 cm with a wingspan of 32–38 cm (13–15 in) and weights 30 to 40 grams.
Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...
A male ferret is called a hob; a female ferret is a jill. A spayed female is a sprite, a neutered male is a gib, and a vasectomised male is known as a hoblet. Ferrets under one year old are known as kits. A group of ferrets is known as a "business", [4] or historically as a "busyness".
People are often confused about the life cycle of birds and what one is supposed to do with a baby bird found outside of a nest—but not this Bernese Mountain Dog.
In birds, sleep consists of "periods of eye closure interrupted by short periods of eye-opening." [This quote needs a citation] During the short periods of eye-opening, electroencephalographic (EEG) studies indicate that the birds are still sleeping; the voltage level in the brain is identical. [1] Birds restore their arousal thresholds during ...
Birds from the north and east of its breeding range migrate to winter further south. This kinglet has greenish upper-parts, whitish under-parts, and has two white wingbars. It has a plain face contrasting black irises and a bright head crest, orange and yellow in the male and yellow in the female, which is displayed during breeding.
Ed Gernon of Whittier, Calif. probably didn't expect to add a hummingbird to his household pet list, but an unusual event brought him, his dog Rex and a little bird all together.
Male birds have two Z chromosomes (ZZ), and female birds have a W chromosome and a Z chromosome (WZ). [77] A complex system of disassortative mating with two morphs is involved in the white-throated sparrow Zonotrichia albicollis , where white- and tan-browed morphs of opposite sex pair, making it appear as if four sexes were involved since any ...