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One explanation of Gloger's rule in the case of birds appears to be the increased resistance of dark feathers to feather- or hair-degrading bacteria such as Bacillus licheniformis. Feathers in humid environments have a greater bacterial load, and humid environments are more suitable for microbial growth; dark feathers or hair are more difficult ...
Using computer simulations, Colwell and Hurt (1994) and Willing and Lyons (1998) first pointed out that if species’ latitudinal ranges were randomly shuffled within the geometric constraints of a bounded biogeographical domain (e.g. the continents of the New World, for terrestrial species), species' ranges would tend to overlap more toward the center of the domain than towards its limits ...
This is a list of the bird species recorded in Equatorial Guinea.The avifauna of Equatorial Guinea include a total of 837 species.. This list's taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) follow the conventions of The Clements Checklist of Birds of the World, 2022 edition.
The Accipitridae (/ ˌ æ k s ɪ ˈ p ɪ t r ɪ d iː,-d eɪ /) is one of the four families within the order Accipitriformes, [2] and is a family of small to large birds of prey with strongly hooked bills and variable morphology based on diet.
The tropics have far more uniform temperatures over a far wider latitudinal range (about 45 degrees) than high latitude species. As temperature is one of the most important (if not the most important) factor determining geographical distribution, wider latitudinal ranges in the tropics might therefore be expected.
Many birds struggle to survive over the colder months, and robins are particularly vulnerable. Find out how you can help with some of your leftover food.
The evolutionary origin of birds was an open question in paleontology for over a century, but the modern scientific consensus is that birds evolved from small feathered theropods in the Jurassic. Not all dinosaur lineages were cut short at the end of the Cretaceous during the Cretaceous–Paleogene extinction event , and over 11,000 species of ...
Let’s take a look at safe temperature ranges for dogs, cats, and other pets. Best house temperatures for dogs Indoor temperatures in the summer should be what you’re probably used to—between ...