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Due to their rod-like shape, they were identified as eumelanosomes, which correspond to dark shades. Although specific colours were not stated in the analysis, other studies have shown that coloration in extant birds correlates to the length and aspect ratio (length to width ratio) of their eumelanosomes. A sample taken from the crural feathers ...
Dinosaur vision was, in general, better than the vision of most other reptiles, although vision varied between dinosaur species. Coelurosaurs, for example, had good stereoscopic or binocular vision, whereas large carnosaurs had poor binocular vision, comparable to that of modern alligators.
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 ...
Predatory birds hunting in pairs have been observed using a "bait and switch" technique, whereby one bird will distract the prey while the other swoops in for the kill. Social behavior requires individual identification, and most birds appear to be capable of recognizing mates, siblings, and young.
Ji and Ji (1996) identified many features that set Sinosauropteryx apart from other birds and dinosaurs. They found that it was a small primitive bird with a relatively high skull, blunt rostrum and a slightly high premaxilla; that the antorbital fenestra was elliptical but not enlarged, the dentary was robust, the surangular was narrow and ...
How do birds get their colors? Understanding bird coloration combines biology and physics. There are two primary ways that birds get their color: pigmentation and the physical structure of the ...
On the perilous Jurassic Period landscape of western North America, it was good to be big. Paleontologists have conducted a study scrutinizing bite marks left by meat-eating dinosaurs on the bones ...
Birds, members of the paraves, are the only living dinosaurs. Paraves are a widespread group of theropod dinosaurs that originated in the Middle Jurassic period. In addition to the extinct dromaeosaurids, troodontids, anchiornithids, and possibly the scansoriopterygids, the group also contains the avialans, which include diverse extinct taxa as well as the over 10,000 species of living birds.