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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 ...
Males do not require as much sleep during this time; some have been observed to give up 95 percent of their sleep time during the nineteen mating days. [2] Most act similarly to humans when sleep-deprived, getting them into potentially life-threatening situations or slowing their migration speed.
Barbary falcons have a red neck patch, but otherwise differ in appearance from the peregrine falcon proper merely according to Gloger's rule, relating pigmentation to environmental humidity. [53] The Barbary falcon has a peculiar way of flying, beating only the outer part of its wings as fulmars sometimes do; this also occurs in the peregrine ...
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The kiwi is a family of nocturnal birds endemic to New Zealand.. While it is difficult to say which came first, nocturnality or diurnality, a hypothesis in evolutionary biology, the nocturnal bottleneck theory, postulates that in the Mesozoic, many ancestors of modern-day mammals evolved nocturnal characteristics in order to avoid contact with the numerous diurnal predators. [3]
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. Matutinal, a classification of organisms that are only or primarily active in the pre-dawn hours or early morning.
"Longwings": Falcons (peregrine falcons, kestrels, gyrfalcons, saker falcons) Owls are also used, although they are far less common. In determining whether a species can or should be used for falconry, the species' behavior in a captive environment, its responsiveness to training, and its typical prey and hunting habits are considered.
Pale individuals may also have prominently white under tail coverts and these may be diagnostic. A distinctive aspect of their behaviour is shown in the breeding season when brown falcons make a loud, high pitched, cackle call (like a laying hen) and screeching while in flight. [2] The species name berigora has Aboriginal origins.