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From the tiny bumblebee hummingbird to the massive flightless ostrich, the world’s more than 10,000 species of birds displays a staggering variety. The focus of this video are the birds with the ...
The New World barbets are plump birds, with short necks and large heads. Most species are brightly coloured, with bold patterns of mainly green, red, yellow, white, or black. Their rictal bristles (stiff hair-like feathers at the base of the beak) are shorter and less dense than those of the Asian and African barbets .
Modern birds would have expanded from West Gondwana through two routes. One route was an Antarctic interchange in the Paleogene. The other route was probably via Paleocene land bridges between South America and North America, which allowed for the rapid expansion and diversification of Neornithes into the Holarctic and Paleotropics. [7]
Neoaves is a clade that consists of all modern birds (Neornithes or Aves) with the exception of Palaeognathae (ratites and kin) and Galloanserae (ducks, chickens and kin). [4] This group is defined in the PhyloCode by George Sangster and colleagues in 2022 as "the most inclusive crown clade containing Passer domesticus, but not Gallus gallus". [5]
Ornithurae (meaning "bird tails" in Greek) is a natural group that includes modern birds and their very close relatives such as Ichthyornis and the hesperornithines.This clade is defined in the PhyloCode by Juan Benito and colleagues in 2022 as "the smallest clade containing Ichthyornis dispar, Hesperornis regalis, and Vultur gryphus".
One of the key remaining questions among researchers about bird evolution is why the more diverse enantiornithines went extinct 66 million years ago along with the dinosaurs, while another group ...
[4] [5] The modern bird superorder Palaeognathae consists of ratites and the flighted Neotropic tinamous (compare to Neognathae). [6] Unlike other flightless birds, the ratites have no keel on their sternum—hence the name, from the Latin ratis ('raft', a vessel which has no keel—in contradistinction to extant flighted birds with a keel). [7]
This article lists living orders and families of birds. In total there are about 10,000 species of birds described worldwide, though one estimate of the real number places it at almost twice that. [1] The order passerines (perching birds) alone accounts for well over 5,000 species.