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The origin of the reptiles lies about 320–310 million years ago, in the swamps of the late Carboniferous period, when the first reptiles evolved from advanced labyrinthodonts. [2] The oldest known animal that may have been an amniote, a reptile rather than an amphibian, is Casineria [3] [4] (though it has also been argued to be a temnospondyl ...
[129] [130] The pellet of the barred owl averages about 3.5 cm (1.4 in) in diameter and 7.2 cm (2.8 in) in length. [7] A 1908 photo of a site found with a massive amount of barred owl casts and pellets near Carlisle, Pennsylvania. The barred owl has been known to consume a diversity of animals from different taxonomic classes.
The owl's remains date back to the Miocene-Pliocene boundary 5.5 to 5 million years ago. The fossil bones are about 60% as long again as a modern barn owl, [1] giving a total length of about 50–65 cm for T. robusta. This owl provides an interesting case study of evolution and insular gigantism.
The bird family Tytonidae, which includes the barn owls Tyto and the bay owls Phodilus, is one of the two families of owls, the other being the true owls or typical owls, Strigidae. They are medium to large owls with large heads and characteristic heart-shaped faces. They have long, strong legs with powerful talons. They also differ from the ...
Owls are divided into two families: the true (or typical) owl family, Strigidae, and the barn owl and bay owl family, Tytonidae. [2] Owls hunt mostly small mammals, insects, and other birds, although a few species specialize in hunting fish. They are found in all regions of the Earth except the polar ice caps and some remote islands.
The pueo is recognized as an endemic subspecies of short-eared owl by the state of Hawai’i; [4] on the island of O’ahu, the state currently lists it as an endangered species. [5] Nevertheless, the pueo’s presence in Hawai’i is the result of prehistoric human activities, not solely natural evolution or avian migration , thus blurring the ...
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Anoles on a given island evolve into multiple body types and ecological preferences, and the same set of body types appears in unrelated species across distant islands. [93] The Asian sea snake Hydrophis schistosus (beaked sea snake) looks just like the Australian sea snake Hydrophis zweifeli, but in fact is not related. [94]