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A peacock spreading his tail, displaying his plumage Peahen. Peafowl is a common name for two bird species of the genus Pavo and one species of the closely related genus Afropavo within the tribe Pavonini of the family Phasianidae (the pheasants and their allies). Male peafowl are referred to as peacocks, and female peafowl are referred to as ...
The first shark-like chondrichthyans appeared in the oceans 400 million years ago, [1] developing into the crown group of sharks by the Early Jurassic. [2] Listed below are extant species of shark. Sharks are spread across 512 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
Indian peacocks were frequently used in European heraldry with the peacocks most often depicted as facing the viewer and with the tails displayed. In this pose, the peacock is referred to as being "in his pride". Peacock tails, in isolation from the rest of the bird, are rare in British heraldry, but are used frequently in German systems. [99]
It was thought that the sharks form a polyphyletic group: some sharks are more closely related to rays than they are to some other sharks, [21] but current molecular studies support monophyly of both groups of sharks and batoids. [22] [23] The clade Selachimorpha is divided into the superorders Galea (or Galeomorphii), and Squalea (or ...
Why do sharks attack humans? According to the Shark Research Institute, there are over 400 plus species of shark around the world, which include great white sharks, tiger sharks and bull sharks.
Most species live on the sea floor, in a variety of geographical regions – mainly in coastal waters, although some live in deep waters to at least 3,000 metres (9,800 ft). Most batoids have a cosmopolitan distribution , preferring tropical and subtropical marine environments, although there are temperate and cold-water species.
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