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The narwhal was scientifically described by Carl Linnaeus in his 1758 publication Systema Naturae. [5] The word "narwhal" comes from the Old Norse nárhval, meaning 'corpse-whale', which possibly refers to the animal's grey, mottled skin and its habit of remaining motionless when at the water's surface, a behaviour known as "logging" that usually happens in the summer.
In particular, the characteristic narwhal 'horn' is anatomically a tooth; the unidentified specimen lacked a single narwhal tusk, but its teeth were spiraled, like the tusk of a narwhal. [ 5 ] [ 3 ] The specimen had 18 teeth, an intermediate number when compared to the beluga (40 teeth) and the narwhal (one tooth).
They are highly vocal animals, communicating with a wide range of sounds. Like other whales, they also use echolocation to navigate. [ 2 ] Belugas can be found in the far north of the Atlantic and Pacific Oceans; the distribution of narwhals is restricted to the Arctic and Atlantic Oceans.
Ganges river dolphin (national aquatic animal) Platanista gangetica [33] Indian elephant (national heritage animal) Elephas maximus indicus [34] Indonesia: Komodo dragon (national animal) Varanus komodoensis [35] Javan hawk-eagle (national bird) Nisaetus bartelsi [35] Asian arowana (national fish) Scleropages formosus [35] Italy: Italian wolf ...
Skull of a cross between a narwhal and a beluga whale, at the Zoological Museum, Copenhagen. The beluga was first described in 1776 by Peter Simon Pallas. [1] It is a member of the family Monodontidae, which is in turn part of the parvorder Odontoceti (toothed whales). [1]
The most widely used test for self-awareness in animals is the mirror test, in which a temporary dye is placed on an animal's body and the animal is then presented with a mirror. Researchers then explore whether the animal shows signs of self-recognition. [70] Critics claim that the results of these tests are susceptible to the Clever Hans effect.
This is a list of North American mammals.It includes all mammals currently found in the United States, St. Pierre and Miquelon, Canada, Greenland, Bermuda, Mexico, Central America, and the Caribbean region, whether resident or as migrants.
Blue whale Humpback whale A pod of narwhals Beluga Atlantic white-sided dolphin Orcas. The infraorder Cetacea includes whales, dolphins and porpoises. They are the mammals most fully adapted to aquatic life with a spindle-shaped nearly hairless body, protected by a thick layer of blubber, and forelimbs and tail modified to provide propulsion ...