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Unlike mammals and birds, some reptiles, particularly some species of python and tegu, possess seasonal reproductive endothermy in which they are endothermic only during their reproductive season. In common parlance, endotherms are characterized as "warm-blooded".
A significant proportion of creatures commonly referred to as "warm-blooded," like birds and mammals, exhibit all three of these categories (i.e., they are endothermic, homeothermic, and tachymetabolic). However, over the past three decades, investigations in the field of animal thermophysiology have unveiled numerous species within these two ...
Birds feature in the flag designs of 17 countries and numerous subnational entities and territories. [328] Birds are used by nations to symbolise a country's identity and heritage, with 91 countries officially recognising a national bird. Birds of prey are highly represented, though some nations have chosen other species of birds with parrots ...
Bergmann's rule is most often applied to mammals and birds which are endotherms, but some researchers have also found evidence for the rule in studies of ectothermic species, [2] [3] such as the ant Leptothorax acervorum. While Bergmann's rule appears to hold true for many mammals and birds, there are exceptions. [4] [5] [6]
The dichotomy between income and capital breeders was introduced in 1980 by R. H. Drent and S. Daan [6] to explain why birds usually laid their eggs later than the time that would maximize nestling survival for the population. [1] Ectotherms are generally capital breeders, whereas endotherms rely on income breeding more often. This difference ...
Gloger's rule is an ecogeographical rule which states that within a species of endotherms, more heavily pigmented forms tend to be found in more humid environments, e.g. near the equator. It was named after the zoologist Constantin Wilhelm Lambert Gloger , who first remarked upon this phenomenon in 1833 in a review of covariation of climate and ...
Hibernation functions to conserve energy when sufficient food is not available. To achieve this energy saving, an endothermic animal decreases its metabolic rate and thereby its body temperature. [3] Hibernation may last days, weeks, or months—depending on the species, ambient temperature, time of year, and the individual's body-condition.
Kleptothermy is observed, particularly amongst juveniles, in endotherms such as bats [36] and birds (such as the mousebird [37] and emperor penguin [38]). This allows the individuals to increase their thermal inertia (as with gigantothermy) and so reduce heat loss. [39] Some ectotherms share burrows of ectotherms. Other animals exploit termite ...