The Serengeti White-bearded Wildebeest, Connochaetes mearnsi, is restricted to the Serengeti–Mara ecosystem of southern Kenya and northern Tanzania. It is a small, dark form with a longer tail and a hanging mane. Most of the population moves seasonally in the dry season.
This is a small, dark wildebeest. Its legs contrast less with the body, and the chest and flanks tend to be blackish. Its tail is noticeably longer than in other members of the C. taurinus group, and the mane hangs limp. The horns have a narrower spread, tips that turn inward less, and a more pronounced basal boss.
It inhabits short-grass plains near water. When grass growth stops in the dry season, herds gather into large groups and move to new grazing; some individuals remain on the same pastures all year. It grazes, with Themeda triandra forming a large part of the diet.
An extinction-risk assessment has not been added yet.