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The crocodile icefish or white-blooded fish comprise a family (Channichthyidae) of notothenioid fish found in the Southern Ocean around Antarctica. They are the only known vertebrates to lack hemoglobin in their blood as adults. [ 2 ]
One species, the scimitar oryx, was once extinct in the wild, though populations are now recovering. The bluebuck went extinct in the last 200 years, and the aurochs went extinct 400 years ago. A third extinct species, the red gazelle, potentially never existed, [2] and the kouprey is potentially extinct, with no sightings since 1969. [3]
Blue: sea turtles, black: land turtles ... Turtles are ectotherms or "cold-blooded", ... all the Asian box turtles were placed on the CITES list of endangered species.
Having a lifespan of between 15 to 20 years, an Argentine Black and White Tegu differs from most other reptiles on this list because it’s one of the first known warm-blooded lizards.
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs .
The previously mentioned antarctic blue whale holds the title of the biggest animal on earth. It can weigh up to 400,000 pounds and reach a length of 98 feet. It can weigh up to 400,000 pounds and ...
The concept of a Blue List was derived in 1971 by Robert Arbib from the National Audubon Society in his article, "Announcing-- The Blue List: an 'early warning' system for birds". The article stated that the list was made up for species that appear to be locally common in North America, but is undergoing non-cyclic declines. [ 1 ]
Whales are fully aquatic, open-ocean animals: they can feed, mate, give birth, suckle and raise their young at sea. Whales range in size from the 2.6 metres (8.5 ft) and 135 kilograms (298 lb) dwarf sperm whale to the 29.9 metres (98 ft) and 190 tonnes (210 short tons) blue whale, which is the largest known animal that has ever lived.