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While some birds are generalists, others are highly specialised in their habitat or food requirements. Even within a single habitat, such as a forest, the niches occupied by different species of birds vary, with some species feeding in the forest canopy, others beneath the canopy, and
Ornithology is a branch of zoology that concerns the study of birds. [ 1 ] Several aspects of ornithology differ from related disciplines, due partly to the high visibility and the aesthetic appeal of birds. [ 2 ] It has also been an area with a large contribution made by amateurs in terms of time, resources, and financial support.
Outline of life forms. The following outline is provided as an overview of and topical guide to life forms: A (also spelled or ) is an that is living, [1][2] such as plants (flora), animals (fauna), and fungi (funga). It is estimated that more than 99% of all species that ever existed on Earth, amounting to over five billion species, [3] are ...
The deadwood they leave behind becomes a host to many beneficial insects, which also form a food supply for birds and rodents. Many smaller mammals will make their homes in beaver lodges or in ...
Morphological studies of the hummingbird brain showed that neuronal hypertrophy – relatively the largest in any bird – exists in a region called the pretectal nucleus lentiformis mesencephali (called the nucleus of the optic tract in mammals) responsible for refining dynamic visual processing while hovering and during rapid flight.
Finch. The true finches are small to medium-sized passerine birds in the family Fringillidae. Finches generally have stout conical bills adapted for eating seeds and nuts and often have colourful plumage. They occupy a great range of habitats where they are usually resident and do not migrate. They have a worldwide native distribution except ...
About one half of bird species with fovea have a single one, but uniquely in birds, [221] some, such as terns, kingfishers and hummingbirds, have a second fovea, [222] called the temporal fovea, that assists in judging speed and distance and increases visual acuity. Birds that do not have a second fovea will sometimes bob their head to improve ...
Adaptation is the evolutionary process whereby an organism becomes better able to live in its habitat or habitats. [25][26][27] 2. Adaptedness is the state of being adapted: the degree to which an organism is able to live and reproduce in a given set of habitats. [28]