Elephant

Elephants are large land mammals in two genera of the family Elephantidae: Elephas and Loxodonta. Three species of elephant are living today: the African bush elephant, the African forest elephant and the Asian elephant (also known as the Indian elephant). All other species and genera of Elephantidae are extinct, some since the last ice age although dwarf forms of mammoths may have survived as late as 2,000 BCE.^[1] Elephants and other Elephantidae were once classified with other thick-skinned animals in a now invalid order, Pachydermata.
Elephants are the largest land animals now living.^[2] The elephant's gestation period is 22 months, the longest of any land animal. At birth it is common for an elephant calf to weigh 120 kilograms (260 lb). They typically live for 50 to 70 years, but the oldest recorded elephant lived for 82 years.^[3] The largest elephant ever recorded was shot in Angola in 1956. This male weighed about 24,000 lb (11,000 kg),^[4] with a shoulder height of 3.96 metres (13.0 ft), a metre (yard) taller than the average male African elephant.^[5] The smallest elephants, about the size of a calf or a large pig, were a prehistoric species that lived on the island of Crete during the Pleistocene epoch.^[6]
Elephants are a symbol of wisdom in Asian cultures and are famed for their memory and intelligence, where their intelligence level is thought to be equal to that of dolphins^{[7][8][9][10]} and primates.^[11][12] Aristotle once said the elephant was "the beast which passeth all others in wit and mind."^[13] The word "elephant" has its origins in the Greek ἐλέφας, meaning "ivory" or "elephant".^[14]
According to observations, healthy adult elephants have no natural predators,^[15] although lions may take calves or weak individuals.^[16][17] They are, however, threatened by human intrusion and

Defined strictly, a deer is a ruminant mammal belonging to the family Cervidae. A number of broadly similar animals, from related families within the order Artiodactyla, are often also called deer.
Depending on the species, male deer are called stags, bucks or bulls, and females are called hinds, does or cows. Young deer are called fawns or calves. Hart is an expression for a stag, particularly a Red Deer stag past its fifth year. It is not commonly used, but an example is in Shakespeare's "Romeo and Juliet" when Tybalt refers to the brawling Montagues and Capulets as hartless hinds.
Deer are widely distributed, with representatives in all continents except Australia and Africa.
Deer differ from other ruminants in that they have antlers instead of horns. Antlers are bony growths which develop each year (usually in summer) and, in general, it is only male deer that develop them (although there are exceptions).
There are about 43 species
 of deer worldwide, divided into two broad groups: the old world group includes the subfamilies Muntiacinae and Cervinae; the new world deer the subfamilies Hydropotinae and Capreolinae. Note that the terms indicate the origin of the groups, not their modern distribution: the Water Deer, for example, is a new world species but is found only in China and Korea.
It is thought that the new world group evolved about 5 million years ago in the forests of North America and Siberia, the old world deer in Asia.

Deer are selective feeders. They have small, unspecialised stomachs by herbivore standards, and high nutrition requirememts: ingesting sufficient minerals to grow a new pair of antlers every year is a significant task. Rather than attempt to digest vast quantities of low-grade, fiberous food as, for example, sheep and cattle do, deer select easily digestable shoots, young leaves, fresh grasses, soft twigs, fruit, fungi, and lichens.
Deer have long had economic significance to humans. While they are generally not as easily domesticated as sheep, goats, pigs and even cattle, the association between people and deer is very old. Deer meat, for which they are hunted and farmed, is called venison.