Identical poses occur
among modern birds.
But which parts of the sternum fuse first varies widely
among modern birds.
Not exact matches
«Reproduction in
modern birds is distinct
among living vertebrates.
That discovery, combined with other fossil finds in North America that are related to chickens, turkeys, flamingos, and loons,
among others, suggests that most major groups of
modern birds originated and began to diversify before the K - T boundary.
Among them: Why did a large class of now - extinct
birds called Enantiornithines (which were superficially similar to
modern birds) die out?
«The new fossils superbly document the link between
modern whales and their land - based forebears,» he concludes, «and should take their place
among other famous «intermediates,» such as the most primitive
bird, Archaeopteryx, and the early hominid Australopithecus.
Modern birds use their feet in order to interact with their environment in numerous and complex ways — relying on them for locomotion, prey capture, grooming, perching, nesting, and even fighting
among themselves or for defense from predators or competing species.
To date, it has been controversial
among experts whether the bristles of Psittacosaurus are comparable to the feathers of
modern birds.