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Common name Binomial name/Trinomial name Population Status Trend Notes Image African bush elephant: Loxodonta africana: 352,000 [1]: EN [1] [1]The population has been reduced dramatically (african elephant populations in 18 countries declined by ~30%) since a mass ivory sell off by southern african countries in the early 2000's to present time.
Echo, matriarch who was called the "most studied elephant in the world, the subject of several books and documentaries, including two NATURE films". [2] Isilo of Tembe Elephant Park was one of South Africa’s largest African elephants. Kongad Kuttisankaran, one of the few native elephants born in Kerala to have a height of more than 309 cm.
The family Bovidae consists of 146 extant species belonging to 53 genera in 9 subfamilies and divided into hundreds of extant subspecies. This does not include hybrid species or extinct prehistoric species. Additionally, the bluebuck went extinct in the last 200 years, and the aurochs went extinct 400 years ago.
They are among the world's most intelligent species. With a mass of just over 5 kg (11 lb), the elephant brain is larger than that of any other terrestrial animal. The elephant's brain is similar to a human brain in terms of structure and complexity; the elephant's cortex has as many neurons as that of a human brain, [43] suggesting convergent ...
The earliest members of the modern genera of Elephantidae appeared during the latest Miocene–early Pliocene around 5 million years ago. The elephantid genera Elephas (which includes the living Asian elephant) and Mammuthus (mammoths) migrated out of Africa during the late Pliocene, around 3.6 to 3.2 million years ago. [17]
The common allotrope of elemental oxygen on Earth is called dioxygen, O 2, the major part of the Earth's atmospheric oxygen (see Occurrence). O 2 has a bond length of 121 pm and a bond energy of 498 kJ/mol. [42] O 2 is used by complex forms of life, such as animals, in cellular respiration. Other aspects of O 2 are covered in the remainder of ...
With few exceptions, animals consume organic material, breathe oxygen, are able to move, reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development. 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 ...
More than 99 percent of all species, amounting to over five billion species, [7] that ever lived on Earth are estimated to be extinct. [8] [9] Estimates on the number of Earth's current species range from 10 million to 14 million, [10] of which about 1.2 million have been documented and over 86 percent have not yet been described. [11]