Herd of elephants under a tree in Serengeti

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Herd of elephants under a tree in Serengeti National Park, Tanzania.

The African bush elephant (Loxodonta africana), also known as the African savanna elephant, is the larger of the two species of African Elephants. Both elephants, previously classified as exactly the same species, now prove different based from recent preliminary evidence which re-classifies the African forest elephant as a separate and distinct species (although this status is not conclusively accepted due to concerns over conservation strategies until the re-classification is formalized).

The African bush elephant has many distinctive features that sets it apart from the forest elephant. The bush elephant is much larger in height and weight, while the forest elephant has rounder ears and their trunk tends to be more hairy. The bush elephant has few predators, but still remains to be labeled an endangered species, mostly because of poaching. These elephants are known for being hunted for their tusks, ears, feet, and meat, so the population of bush elephants in the world have been increasingly declining. Their roaming has been limited to only specific areas, since they have been known for destruction of crops and landscape in certain areas. However they still travel in herds, with females being the primary leaders.

The African bush elephant is a very active and social mammal, since they are constantly on the move in search of food. Males often fight with each other during mating season, however they are considered to be very loving and caring toward relatives. Bush elephants also have strong social bonds, and when their herds are faced with danger, they tend to form a close, protective circle around the young calves. The elephants also tend to use their trunks to engage in physical greetings and behaviors.

The dramatic decline of the African bush elephant has resulted in various legal protections taking place in several states of Africa. Census reports show between the years of 2007 and 2014 there has been a decrease of 30% in the elephant’s population. The current rate at which the population is declining, leaves researchers to believe every year the African bush elephant will decline by 8%.

The Serengeti National Park is a Tanzanian national park in the Serengeti ecosystem in the Mara and Simiyu regions.

The park covers 14,750 square kilometres (5,700 sq mi) of grassland plains, savanna, riverine forest, and woodlands. The park lies in northwestern Tanzania, bordered to the north by the Kenyan border, where it is continuous with the Maasai Mara National Reserve. To the southeast of the park is the Ngorongoro Conservation Area, to the southwest lies Maswa Game Reserve, to the west are the Ikorongo and Grumeti Game Reserves, and to the northeast and east lies the Loliondo Game Control Area. Together, these areas form the larger Serengeti ecosystem.

The park is worldwide known for its abundance of wildlife and high biodiversity.

The park was the location of filming for The Grassland Landscape Of Planet Serengeti along with Masai Mara. (Description from Wikipedia)

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Great Migration

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Blue wildebeest during the Great Migration in Serengeti National Park, Tanzania.

The wildebeests, also called gnus, are a genus of antelopes, scientific name Connochaetes. They belong to the family Bovidae, which includes antelopes, cattle, goats, sheep and other even-toed horned ungulates. Connochaetes includes two species, both native to Africa: the black wildebeest, or white-tailed gnu (C. gnou); and the blue wildebeest, or brindled gnu (C. taurinus).

Blue wildebeest have both migratory and sedentary populations. In the Ngorongoro most animals are sedentary and males maintain a network of territories throughout the year, even though breeding is seasonal in nature. Females and young form groups of about ten individuals or join together in larger aggregations, and non-territorial males form bachelor groups. In the Serengeti and Tarangire ecosystems, populations are mostly migratory, with herds consisting of both sexes frequently moving, but resident subpopulations also exist. During the rutting season, the males may form temporary territories for a few hours or a day or so, and attempt to gather together a few females with which to mate, but soon they have to move on, often moving ahead to set up another temporary territory.

Each year, some East African populations of blue wildebeest have a long-distance migration, seemingly timed to coincide with the annual pattern of rainfall and grass growth. The timing of their migrations in both the rainy and dry seasons can vary considerably (by months) from year to year. At the end of the wet season (May or June in East Africa), wildebeest migrate to dry-season areas in response to a lack of surface (drinking) water. When the rainy season begins again (months later), animals quickly move back to their wet-season ranges. Factors suspected to affect migration include food abundance, surface water availability, predators, and phosphorus content in grasses. Phosphorus is a crucial element for all life forms, particularly for lactating female bovids. As a result, during the rainy season, wildebeest select grazing areas that contain particularly high phosphorus levels. One study found, in addition to phosphorus, wildebeest select ranges containing grass with relatively high nitrogen content.

Aerial photography has revealed that there is a level of organisation in the movement of the herd that cannot be apparent to each individual animal; for example, the migratory herd exhibits a wavy front, and this suggests that there is some degree of local decision-making taking place. Numerous documentaries feature wildebeest crossing rivers, with many being eaten by crocodiles or drowning in the attempt. While having the appearance of a frenzy, recent research has shown a herd of wildebeest possesses what is known as a “swarm intelligence”, whereby the animals systematically explore and overcome the obstacle as one. Major predators that feed on wildebeest include the lion, hyena, cheetah, leopard, and crocodile, which seem to favour the wildebeest over other prey. Wildebeest, however, are very strong, and can inflict considerable injury even to a lion. Wildebeest have a maximum running speed of around 80 km/h (50 mph). The primary defensive tactic is herding, where the young animals are protected by the older, larger ones, while the herd runs as a group. Typically, the predators attempt to cut out a young or ill animal and attack without having to worry about the herd. Wildebeest have developed additional sophisticated cooperative behaviours, such as animals taking turns sleeping while others stand guard against a night attack by invading predators. Wildebeest migrations are closely followed by vultures, as wildebeest carcasses are an important source of food for these scavengers. The vultures consume about 70% of the wildebeest carcasses available. Decreases in the number of migrating wildebeest have also had a negative effect on the vultures. In the Serengeti ecosystem, Tanzania, wildebeest may help facilitate the migration of other, smaller-bodied grazers, such as Thomson’s gazelles (Eudorcas thomsonii), which eat the new-growth grasses stimulated by wildebeest foraging. (Descrition from Wikipedia).

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