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Ichthyornithes is an extinct group of toothed avialan dinosaurs very closely related to the common ancestor of all modern birds.They are known from fossil remains found throughout the late Cretaceous period of North America, though only two genera, Ichthyornis and Janavis, are represented by complete enough fossils to have been named.
The Pelagornithidae, commonly called pelagornithids, pseudodontorns, bony-toothed birds, false-toothed birds or pseudotooth birds, are a prehistoric family of large seabirds. Their fossil remains have been found all over the world in rocks dating between the Early Paleocene and the Pliocene - Pleistocene boundary.
This list of Mesozoic birds is a comprehensive list of all Mesozoic dinosaurs that have been assigned to the clade Avialae (birds, in the broadest sense). The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (nomen dubium), or were not formally published (nomen nudum), as well as junior synonyms of more established names, and genera that are ...
In humans, the vermiform appendix is sometimes called a vestigial structure as it has lost much of its ancestral digestive function.. Vestigiality is the retention, during the process of evolution, of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species. [1]
This is a category for birds that are only known from fossil evidence or oral traditions. Note however, that unlike this category, Category:Birds is only for neornithines . Several early taxa are not unequivocally classified as birds or non-avian dinosaurs; for these, both inclusion in this category and Category:Feathered dinosaurs is feasible.
View of birds flying around the Bird Key, a private island on Biscayne Bay that is now for sale as environmentalists are upset, because developers could build on the island, displacing all the ...
“They are the only group of birds that achieved the role of terrestrial apex predators, evolving species that basically conquered South America during the Miocene (about 23.03 million to 5.33 ...
Subspecies S. v. salvadorii, illustration by Keulemans, 1877. The Australasian figbird (Sphecotheres vieilloti), also known as the green figbird (not to be confused with the Timor figbird), is a conspicuous, medium-sized passerine bird native to a wide range of wooded habitats in northern and eastern Australia, southern New Guinea, and the Kai Islands. [2]
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