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The white-crowned sparrow (Zonotrichia leucophrys) is a species of passerine bird native to North America.A medium-sized member of the New World sparrow family, this species is marked by a grey face and black and white streaking on the upper head.
A Black-and-white hawk-eagle in captivity. As its name suggests, this is a black and white eagle, resembling the small typical eagles sometimes separated in "Hieraaetus". It is some 20–24 in (51–61 cm) long overall and weighs about 30 oz (850 g).
The black-billed magpie is an unmistakable bird within its range. It is a medium-sized bird that measures 45–60 centimeters (18–24 in) from tip to tail. It is largely black, with white scapulars, belly, and primaries, and the wings and tail are an iridescent blue-green. The tail is made up of long, layered feathers, the middle pair of which ...
The black-and-white shrike-flycatcher (Bias musicus), also known as the black-and-white flycatcher or vanga flycatcher, is a species of passerine bird found in Africa.It was placed with the wattle-eyes and batises in the family Platysteiridae but is now considered to be more closely related to the helmetshrikes and woodshrikes.
[6] [3] The summer male black-and-white warbler is boldly streaked in black and white, and the bird has been described as a flying humbug. [7] Each wing is black with two white wing bars. Female and juvenile plumages are similar, but duller and less streaky than males. This warbler can be confused with the blackpoll warbler (Setophaga striata ...
Black-bellied whistling duck, by Alan D. Wilson (edited by Olegivvit) Rock dove , by Alan D. Wilson Red-tailed hawk eating a California vole , by Steve Jurvetson
Müller's explanation of the mechanism for this was one of the first uses of mathematics in biology. He argued that a predator, such as a young bird, must attack at least one insect, say a wasp, to learn that the black and yellow colours mean a stinging insect. If bees were differently coloured, the young bird would have to attack one of them also.
The pied butcherbird (Cracticus nigrogularis) is a songbird native to Australia.Described by John Gould in 1837, it is a black and white bird 28 to 32 cm (11 to 12.5 in) long with a long hooked bill.