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In East Africa, the blue wildebeest is the most abundant big game species; some populations perform an annual migration to new grazing grounds, but the black wildebeest is merely nomadic.Breeding in both takes place over a short period of time at the end of the rainy season and the calves are soon active and are able to move with the herd, a fact necessary for their survival.

The most striking morphological differences between the black and blue wildebeest are the orientation and curvature of their horns and the color of their coats.

The blue wildebeest is the bigger of the two species.

In some animals, the tympanic part of the temporal bone is highly deformed and in others the radius and ulna are fused.

Both species of wildebeest are even-toed, horned, greyish-brown ungulates resembling cattle.

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.

Nevertheless, some fall prey to large carnivores, especially the spotted hyena.

Wildebeest often graze in mixed herds with zebra which gives heightened awareness of potential predators.

In the female, all except a pair of very large submetacentric chromosomes were found to be acrocentric.

Metaphases were studied in the male's chromosomes, and very large submetacentric chromosomes were found there as well, similar to those in the female both in size and morphology. The X chromosome is a large acrocentric and the Y chromosome a minute one.

Some illegal hunting goes on but the population trend is fairly stable and some populations are in national parks or on private land.

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