African Bush Elephant

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   African bush elephant (Loxodonta africana) is the larger of the two species of African elephant. Both it and the African forest elephant have usually been classified as a single species, known simply as the African elephant, but recent evidence has seen the forest elephant classified as a distinct species (although this status is not conclusively accepted due to a gradual reduction in elephant size between savanna and forest environments). Some authorities still consider the currently available evidence as insufficient for splitting African elephants into two species. African bush elephants are the largest living terrestrial animals, being up to 3.96 m (13.0 ft) tall at the shoulders (a male shot in 1974). On average, males are 3.3 metres (10.8 ft) tall at the shoulders and 5.5 tonnes (12,130 lb) in weight, while females are much smaller at 2.8 metres (9.2 ft) tall and 3.7 tonnes (8,160 lb) in weight. The most characteristic features of African elephants are their very large ears, which they use to radiate excess heat, and their trunk, an extension of the upper lip and nose with two opposing extensions at its end, different from the Asian elephant, which only has one. The trunk is used for communication and handling objects and food. African elephants also have bigger tusks, large modified incisors that grow throughout an elephant's lifetime. They occur in both males and females and are used in fights and for marking, feeding, and digging. The African bush elephant is herbivorous. Its diet varies according to its habitat; elephants living in forests, partial deserts, and grasslands all eat different proportions of herbs and tree or shrubbery leaves. Elephants inhabiting the shores of Lake Kariba have been recorded eating underwater plant life. To break down the plants it consumes, the African bush elephant has four large molars, two in each mandible of the jaw. Each of these molars is 10 centimetres (4 in) wide and 30 centimetres (12 in) long. Over time, these molars are worn away, and new ones are grown to replace them as the elephant ages. Around the age of 15, the milk teeth are replaced by new ones that last until the age of 30, and then by another set which wear off past the age of 40, being replaced by the last set of teeth that last until about the age of 65–70. Not much later, the animal dies of starvation from not being able to feed correctly. Specimens over 80 years old are known in captivity. This species typically ingests an average of 225 kilograms (500 lb) of vegetable matter daily, which is defecated without being fully digested. That, combined with the long distances it can cover daily in search of more food, contributes notably to the dispersion of many plant seeds that germinate in the middle of a nutrient-filled feces mound. Elephants rip apart all kind of plants, and knock down trees with the tusks if they are not able to reach the tree leaves. Elephants also drink great quantities of water, over 190 liters (40 imp gal; 50 U.S. gal) per day. Adult males usually live alone. Herds are made up of related females and their young, directed by the eldest female, called the matriarch. Infrequently, an adult male goes with them, but those usually leave the herd when reaching adolescence to form bachelor herds with other elephants of the same age. Later, they lead a solitary life, approaching the female herds only during the mating season. Nevertheless, elephants do not get too far from their families and recognize them when re-encountered. Sometimes, several female herds can blend for a period of time, reaching even hundreds of individuals. The matriarch decides the route and has shown the other members of the herd all the water sources she knows, which the rest can memorize for the future. The relations among the members of the herd are very tight; when a female gives birth to a baby, the rest of the herd acknowledges it by touching her with their trunks. When an old elephant dies, the rest of the herd stays by the corpse for a while. The famous elephant graveyards are false, but these animals have recognized a carcass of their species when they found one during their trips, and even if it was a stranger, they formed around it, and sometimes they even touched its forehead with their trunks. Mating happens when the female becomes receptive, an event that can occur anytime during the year. When she is ready, she starts emitting infrasounds to attract the males, sometimes from kilometers away. The adult males start arriving at the herd during the following days and begin fighting, causing some injuries and even broken tusks. The female shows her acceptance of the victor by rubbing her body against his. They mate, and then both go their own way. After 22 months of gestation (the longest among mammals), the female gives birth to a single 90-cm-high calf which weighs more than 100 kg. The baby feeds on the mother's milk until the age of five, but also eats solid food from as early as six months old. Just a few days after birth, the calf can follow the herd by foot. Like all species of elephant, the male African bush elephant experiences musth, a period of extreme aggression accompanied with high testosterone levels. A bull in musth has been known to attack anything which disturbs him including his family members, humans, and other passive animals such as giraffes and rhinoceros. In one case a young male African bush elephant has been witnessed killing a rhinoceros during musth. The adult African bush elephant generally has no natural predators (other than humans) due to its great size, but the calves (especially the newborns) are vulnerable to lion and crocodile attacks, and (rarely) to leopard and hyena attacks. Some prides of lions prey on both infants and juveniles, especially in the drought months. Lions in Chobe National Park in Botswana have been observed for some time taking both infants (23% of elephant kills) and juveniles. Predation, as well as drought, contribute significantly to infant mortality. Humans are the elephant's major predator. They have been hunted for meat, skin, bones, and tusks. Trophy hunting increased in the 19th and 20th centuries, when tourism and plantations increasingly attracted sport hunters. In 1989, hunting of the African bush elephant for ivory trading was forbidden, after the elephant population fell from several million at the beginning of the 20th century to fewer than 700,000. Trophy hunting continues today. The population of African bush elephants was halved during the 1980s. Scientists then estimated, if no protective measures were taken, the wild elephant would be extinct by 1995. The protection the elephant now receives has been partially successful, but despite increasingly severe penalties imposed by governments against illegal hunting, poaching is still common. CITES still considers this species as threatened with extinction. A 2010 genetic study confirmed the African bush elephant and the African forest elephant are distinct species. By sequencing DNA of 375 nuclear genes, scientists determined the two species diverged around the same time as the Asian elephant and the woolly mammoth, and are as distinct from one another as those two species. As of December 2010, conservation organizations, such as the United Nations Environment Programme's World Conservation Monitoring Centre and the International Union for Conservation of Nature (IUCN), had not distinguished between the two species of African elephants for purposes of assessing their conservation status. As of March 2010, the IUCN Red List classified African elephants as a whole as vulnerable species and the Central African elephant population (forest elephants) as Endangered. Another possible species or subspecies formerly existed; although formally described it has not been widely recognized by the scientific community. The North African elephant (L. a. pharaohensis), also known as the Carthaginian elephant or Atlas elephant, was the animal famously used as a war elephant by Carthage in its many wars with Rome. While the species is designated as vulnerable, conditions vary somewhat by region between East and Southern Africa. The populations in Southern Africa are thought to be increasing at 4% per annum whilst other populations are decreasing In 2006, an elephant slaughter was documented in southeastern Chad by aerial surveys. A series of poaching incidents, resulting in the killing of over 100 elephants, was carried out during the late spring and summer of 2006 in the vicinity of Zakouma National Park. This region has a decades-old history of poaching of elephants, which has caused the population of the region, which exceeded 300,000 in 1970, to drop to about 10,000 today. The African bush elephant officially is protected by Chadian government, but the resources and manpower provided by the government (with some European Union assistance) have proven insufficient to stop the poaching. Human encroachment into or adjacent to natural areas where the African bush elephant occurs has led to recent research into methods of safely driving groups of elephants away from humans, including the discovery that playback of the recorded sounds of angry honey bees are remarkably effective at prompting elephants to flee an area. The African Bush Elephant is the largest of all living creatures on land today, with some individuals growing to weigh more than 6 tons. The Elephant is thought to have been named after the Greek word for ivory, meaning that Elephants were named for their uniquely long tusks. Although many of the ancestors of the African Bush Elephant became extinct during the last ice-age (including the Woolly Mammoth), there are three distinct species of Elephant remaining today which are the Asian Elephant (of which there are a number of sub-species), the African Bush Elephant and the African Forest Elephant. Although these two Elephant species are very similar, the African Bush Elephant is considered to be generally larger than the African Forest Elephant, which has rounder ears and straighter tusks. The African Bush Elephant is the largest known land mammal on Earth, with male African Bush Elephants reaching up to 3.5 metres in height and the females being slightly smaller at around 3 metres tall. The body of the African Bush Elephants can also grow to between 6 and 7 meters long. The tusks of an African Bush Elephant can be nearly 2.5 meters in length and generally weigh between 50 and 100 pounds, which is about the same as a small adult Human. African Bush Elephants have four molar teeth each weighing about 5.0 kg and measuring about 12 inches long. As the front pair of molars in the mouth of the African Bush Elephant wear down and drop out in pieces, the back pair shift forward and two new molars emerge in the back of the African Bush Elephant's mouth. African Bush Elephants replace their teeth six times during their lives but when the African Bush Elephant is between 40 to 60 years old, it no longer has teeth and will likely die of starvation, which is sadly a common cause of death of Elephants in the African wilderness. Although the historical range of it's ancestors ranged right into the Arctic Circle, today the African Bush Elephant is mainly found in central and southern Africa in nomadic herds that wander the plains and grasslands of Africa grazing for food and searching for waterholes. Unlike the slightly smaller African Forest Elephant, the African Bush Elephant inhabits the grassy savanna plains and shrub-land of the African continent in groups that contain mothers and their calves. Generally African Bush Elephant herds contains around 10 individuals but it is not uncommon for family groups to join together, forming a clan which can contains over 1,000 Elephants. This very social lifestyle means that the African Bush Elephants are less vulnerable on the open African plains. Not only is the African Bush Elephant an incredibly sociable mammal but it is also a very active one. African Bush Elephants are nomadic animals meaning that they are constantly on the move in search of food, so moving within these family herds allows them to have greater protection both from predators and from the elements. The trunk of the African Bush Elephant is one of it's most distinguishing features and this extra long nose is not only flexible enough to gather and handle food but can also collect water. It's trunk, along with it's tusks can also be used to defend itself from predators such as Lions, and to fight with other male African Bush Elephants during the mating season. African Bush Elephants are also considered to be highly intelligent and emotional animals displaying behaviours that include giving and receiving love, caring deeply for the young and grieving for dead relatives. African Bush Elephants tend to live relatively long lives, with the average life span being between 60 and 70 years, Female African Bush Elephants reach sexual maturity (are able to reproduce) after 10 or 11 years, but are thought to be most fertile between the ages of 25 and 45. Male African Bush Elephants however, often don't reach sexual maturity until they are nearly 20 years old. After mating and a gestation period of up to 2 years, the female African Bush Elephant gives birth to a single calf (twins have been known but are extremely rare). The African Bush Elephant calf is nursed for 2 years but will remain under the guidance and protection of the herd until it is old enough to support itself (around 6 years old). It is at this point that the tusks of the African Bush Elephant calf will be starting to grow. Despite it's immense size, the African Bush Elephant is a herbivorous mammal meaning that it survives on a diet that solely consists of plants and plant matter. The bulk of the African Bush Elephant's diet is comprised of leaves and branches that are stripped off the trees and bushes using it's trunk. The African Bush Elephant also grazes on fruits and grasses and uses it's immense tusks for digging for roots in the ground and to strip the bark of trees. Food is fed into it's mouth using the trunk, and the large, flat teeth of the African Bush Elephant are then the perfect tool for grinding the vegetation and course plants down so that they can then be more easily digested. The African Bush Elephant has no real natural predators to threaten its survival, mainly due to it's sheer size and the fact that African Bush Elephants often remain within the safety of the herd. African Bush Elephants are Africa's peaceful giants and can be seen co-inhabiting the African wilderness with other large mammals and birds, without problem. In the animal world, Lions and Hyenas may occasionally be able to pick off a young African Bush Elephant that has been separated from it's mother and have also been known to attack adults that are old and sick and therefore more vulnerable. Humans that poach the African Bush Elephants for their ivory tusks are the biggest threat to their survival along with habitat loss across the continent. In the early 19th century, the story of the African Bush Elephant was very different with their being up to 5 million individuals thought to have been roaming the African continent. However due to the increased demand for ivory, Africa's Bush Elephant population is thought to have fallen as much as 85% in some areas. The large ears of the African Bush Elephant are said by some to be shaped somewhat like Africa, but these large flaps of skin are not just for hearing, they are a vital tool in keeping the Elephant cool in the African heat. Like many of the herbivores found throughout Africa, the calves can walk at birth to maximise their chances of survival. An adult African Bush Elephant can drink up to 50 gallons of water every day, and is able to take 1.5 gallons of water into their trunks at time. Sadly, due to an increase of outside interest in Africa and its exotic wonders (particularly towards the mid 20th century), the African Bush Elephant population took a devastating decline towards extinction. After having been brutally killed by poachers for years for their ivory, African Bush Elephants had vanished from much of their native habitat. In 1989 a worldwide elephant ivory hunting ban fell into place, after the populations had dropped so dramatically across the continent. In northern and central parts of Africa, the African Bush Elephant is now rare and confined to protected areas, and although the story is similar in the south, South African Elephant populations are thought to be doing better with an estimated 300,000 individuals in the region. Today, although recovering, African Bush Elephant populations are still threatened from increasing levels of illegal poaching and habitat destruction. Deforestation in the African Bush Elephant's territory means that the African Bush Elephants lose both their food and shelter making them more vulnerable in the wild. Despite the ban, African Bush Elephants are also constantly threatened by poachers hunting the elephants for their ivory tusks.