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Birds of prey or predatory birds, also known as ... Like all birds, raptors possess tetrachromacy, however, due to their emphasis on visual acuity, ...
The four pigments in a bird's cone cells (in this example, estrildid finches) extend the range of color vision into the ultraviolet. [1]Tetrachromacy (from Ancient Greek tetra, meaning "four" and chroma, meaning "color") is the condition of possessing four independent channels for conveying color information, or possessing four types of cone cell in the eye.
The visual ability of birds of prey is legendary, and the keenness of their eyesight is due to a variety of factors. Raptors have large eyes for their size, 1.4 times greater than the average for birds of the same weight, [14] and the eye is tube-shaped to produce a larger retinal image. The resolving power of an eye depends both on the optics ...
The peregrine falcon (Falco peregrinus), also known simply as the peregrine, [3] is a cosmopolitan bird of prey (raptor) in the family Falconidae.A large, crow-sized falcon, it has a blue-grey back, barred white underparts, and a black head.
In his 1665 book Micrographia, Robert Hooke describes the "fantastical" (structural, not pigment) colours of the Peacock's feathers: [3]. The parts of the Feathers of this glorious Bird appear, through the Microscope, no less gaudy then do the whole Feathers; for, as to the naked eye 'tis evident that the stem or quill of each Feather in the tail sends out multitudes of Lateral branches ...
The Accipitriformes (/ æ k ˌ s ɪ p ɪ t r ɪ ˈ f ɔːr m iː z /; from Latin accipiter 'hawk' and formes 'having the form of') are an order of birds that includes most of the diurnal birds of prey, including hawks, eagles, vultures, and kites, but not falcons.
Crested caracara, Brazoria National Wildlife Refuge Crested caracara (C. plancus) in flight Caracaras are birds of prey in the family Falconidae.They are traditionally placed in subfamily Polyborinae with the forest falcons, [1] but are sometimes considered to constitute their own subfamily, Caracarinae, [2] or classified as members of the true falcon subfamily, Falconinae. [3]
Accipitriformes is one of three major orders of birds of prey and includes the osprey, hawks, eagles, kites, and vultures. Falcons (Falconiformes) and owls (Strigiformes) are the other two major orders and are listed in other articles.