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A number of factors determine how quickly any changes may occur in a species, but there is not always a desire to improve a species from its wild form. Domestication is a gradual process, so there is no precise moment in the history of a given species when it can be considered to have become fully domesticated.
Clark's nutcracker (Nucifraga columbiana), sometimes referred to as Clark's crow or woodpecker crow, is a passerine bird in the family Corvidae, native to the mountains of western North America. The nutcracker is an omnivore, but subsists mainly on pine nuts , burying seeds in the ground in the summer and then retrieving them in the winter by ...
Currawongs are dominant birds that can drive off other species, especially when settling around an area used or inhabited by people. [16] They have been known to migrate to towns and cities during the winter. [18] Birds congregate in loose flocks. [16] The female builds the nest and incubates the young alone, although both parents feed them.
Winter rest (from the German term Winterruhe) is a state of reduced activity of plants and warm-blooded animals living in extratropical regions of the world during the more hostile environmental conditions of winter. In this state, they save energy during cold weather while they have limited access to food sources.
Pied crow-shrike is an old vernacular name from colonial days, [11] [14] and the term "pied" refers to two or more colors in blotches. Other common names include pied chillawong, currawang, charawack, kurrawack, tallawong, tullawong, mutton-bird, Otway forester, and pied afternoon-tea bird.
For example, waterfowl captured in a drive can yield a return of around 2,000 kcal/hour, whereas an antelope can yield as much as 31,000 kcal/hour, and wild rye around 1,000 kcal/hour. [6] Battery hens: poultry is a major source of food, the chicken alone providing 20% of the world's animal protein. [7]
Female butcherbirds lay between two and five eggs in a clutch, [2] with the larger clutch sizes in more open-country species. Except in the rainforest-dwelling hooded and black butcherbirds, [ 3 ] cooperative breeding occurs, with many individuals delaying dispersal to rear young. [ 4 ]
Although closely related to domesticated dogs, wolves do not show the same tractability as dogs in living alongside humans, and generally, a greater amount of effort is required in order to obtain the same amount of reliability. Wolves also need much more space than dogs, about 25 to 40 square kilometres (10 to 15 sq mi) so they can exercise. [1]