Ichthyornis
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Ichthyornis is an extinct genus of toothy seabird-like ornithuran from the Late Cretaceous of North America. Its fossil remains are known from the chalks of Alberta, Alabama, Kansas, New Mexico, Saska
Restoration of I. dispar
Skeletal restoration based on the holotype of I. dispar
Skeletal restoration based on the holotype of I. victor (now I. dispar) by O.C. Marsh.
Cast of the original composite panel mount of "I. victor" (now I. dispar), Peabody Museum of Natural History
Bird
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Birds are a group of warm-blooded vertebrate animals constituting the class Aves, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chamb
Ichthyornis
…full re-description of these specimens was published by paleontologist Julia Clarke in 2004. Ichthyornis is close to the ancestry of modern birds, the Aves, but represents an independent lineage. It was long believed that it was closely related to some other Cretaceous taxa known from very fragmentary…
Kleiber Flug
Archaeopteryx is often considered the oldest known true bird.
Anchiornis huxleyi is an important source of information on the early evolution of birds in the Late Jurassic period.
Confuciusornis sanctus, a Cretaceous bird from China that lived 125 million years ago, is the oldest known bird to have a beak.