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However, M. Braun and especially P. Fraisse showed later that the structures in question are of the same kind as the well-known serrated "teeth" of the bill of anserine birds. In fact the papillae observed in the embryonic birds are the soft cutaneous extensions into the surrounding horny sheath of the bill , comparable to the well-known ...
Yellow-naped amazon parrot eye pinning.. Eye pinning, also known as eye flashing [1] or eye blazing, is a form of body language used by parrots.The term that refers to the rapid and very conspicuous dilation and constriction of the pupils of the bird's eyes in response to an external stimulus.
A monocle is a type of corrective lens used to correct or enhance the visual perception in only one eye. It consists of a circular lens placed in front of the eye and held in place by the eye socket itself. Often, to avoid losing the monocle, a string or wire is connected to the wearer's clothing at one end and, at the other end, to either a ...
Because of this, birds usually have a smaller number of bones than other terrestrial vertebrates. Birds also lack teeth or even a true jaw and instead have a beak, which is far more lightweight. The beaks of many baby birds have a projection called an egg tooth, which facilitates their exit from the amniotic egg. It falls off once the egg has ...
The fossil skull of the new species, dubbed Oculudentavis, meaning "eye tooth bird," is just over half an inch long, and researchers think the animal was smaller than the bee hummingbird, the ...
The two non-repeating lines can be used to verify correct wall-eyed viewing. When the autostereogram is correctly interpreted by the brain using wall-eyed viewing, and one stares at the dolphin in the middle of the visual field, the brain should see two sets of flickering lines, as a result of binocular rivalry .
Ichthyornis fossils were first unearthed in the 1870s, but the new ones from Kansas and Alabama chalk deposits, reveal far more about it than once known.
Marvel has released the first trailer for its new animated series “Your Friendly Neighborhood Spider-Man.” The show follows a parallel timeline where Peter Parker, aka Spider-Man, is mentored ...