斑纹角马种

斑纹角马属于群居动物，经常与平原斑马展开大规模迁徙，往返于肯亚马赛马拉国家保护区、坦桑尼亚塞伦盖蒂国家公园与恩戈罗恩戈罗保护区之间，在数量上最高记录可达150万头。

迁徙时程

1～3月：适逢雨季，塞伦盖蒂南部草原正值绿意盎然，母角马会在此待产生下幼羚。

4～6月：降雨开始减少，角马群会随着水汽逐渐北漂，途中行经格鲁美地河。

7～9月：迁徙高峰期。由于塞伦盖蒂适逢旱季，角马群食用的青草不足，因此离开前往马赛马拉，途中行经有尼罗鳄埋伏的马拉河。渡河过程需经历与大量尼罗鳄的生死搏斗，才能平安抵达。

10～12月：由于马赛马拉面积狭小，角马群启程南漂返回塞伦盖蒂，为下一产季做准备，途中行经恩戈罗恩戈罗。

The blue wildebeest (Connochaetes taurinus), also called the common wildebeest, white-bearded gnu or brindled gnu, is a large antelope and one of the two species of wildebeest. It is placed in the genus Connochaetes and family Bovidae, and has a close taxonomic relationship with the black wildebeest. The blue wildebeest is known to have five subspecies. This broad-shouldered antelope has a muscular, front-heavy appearance, with a distinctive, robust muzzle. Young blue wildebeest are born tawny brown, and begin to take on their adult coloration at the age of 2 months. The adults' hues range from a deep slate or bluish-gray to light gray or even grayish-brown. Both sexes possess a pair of large curved horns.

The blue wildebeest is an herbivore, feeding primarily on short grasses. It forms herds which move about in loose aggregations, the animals being fast runners and extremely wary. The mating season begins at the end of the rainy season and a single calf is usually born after a gestational period of about 8.5 months. The calf remains with its mother for 8 months, after which it joins a juvenile herd. Blue wildebeest are found in short-grass plains bordering bush-covered acacia savannas in southern and eastern Africa, thriving in areas that are neither too wet nor too arid. Three African populations of blue wildebeest take part in a long-distance migration, timed to coincide with the annual pattern of rainfall and grass growth on the short-grass plains where they can find the nutrient-rich forage necessary for lactation and calf growth.

The blue wildebeest is native to Angola, Botswana, Eswatini, Kenya, Mozambique, South Africa, Tanzania, Zambia, and Zimbabwe. Today, it is extinct in Malawi, but has been successfully reintroduced in Namibia. The southern limit of the blue wildebeest range is the Orange River, while the western limit is bounded by Lake Victoria and Mount Kenya. The blue wildebeest is widespread and is being introduced into private game farms, reserves, and conservancies. The International Union for Conservation of Nature and Natural Resources rates the blue wildebeest as being of least concern. The population has been estimated to be around 1.5 million, and the population trend is stable.