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Crossed beak, also known as cross beak and scissor beak, is a congenital deformity in birds, particularly poultry, where the upper and lower parts of the beak do not align properly. This condition results in the beak crossing or growing in a way that prevents the bird from closing its beak properly.
The beak, bill, or rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for pecking, grasping, and holding (in probing for food, eating, manipulating and carrying objects, killing prey, or fighting), preening, courtship, and feeding young.
Pair of crows chasing away a red-tailed hawk from their nest. The American crow (Corvus brachyrhynchos) is a large passerine bird species of the family Corvidae. It is a common bird found throughout much of North America. American crows are the New World counterpart to the carrion crow and the hooded crow of Eurasia; they all occupy the same ...
The purple finch is the state bird of New Hampshire. This list of birds of New Hampshire includes species documented in the U.S. state of New Hampshire and accepted by New Hampshire Rare Bird Committee (NHRBC) and New Hampshire Audubon (NHA). [1] As of February 2021, the list contained 425 species.
[14] [15] [16] At all ages and in both sexes, the beak is dusky horn-colored, and the feet and eyes are dark. [17] The adult male in breeding plumage has a black head, wings, back, and tail, and a bright rose-red patch on its breast; the wings have two white patches and rose-red linings. Its underside and rump are white.
The large-billed crow (Corvus macrorhynchos), formerly referred to widely as the jungle crow, is a widespread Asian species of crow.It is very adaptable and is able to survive on a wide range of food sources, making it capable of colonizing new areas, due to which it is often considered a nuisance, especially on islands.
The American robin is the state bird of Michigan. This list of birds of Michigan includes species documented in the U.S. state of Michigan and accepted by the Michigan Bird Records Committee (MBRC). As of January 2023, there are 456 species included in the official list. [1]
The colour of a bird's beak results from concentrations of pigments—primarily melanins and carotenoids—in the epidermal layers, including the rhamphotheca. [39] In general, beak colour depends on a combination of the bird's hormonal state and diet. Colours are typically brightest as the breeding season approaches and palest after breeding. [40]