Both species of wildebeest are even-toed, horned, greyish-brown ungulates resembling cattle. Males are larger than females and both have heavy forequarters compared to their hindquarters. They have broad muzzles, Roman noses, and shaggy manes and tails.[25] 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 males, blue wildebeest stand 150cm tall at the shoulder and weigh around 250kg, while the black wildebeest stands 111 to 120cm tall[26] and weighs about 180kg. In females, blue wildebeest have a shoulder height of 135cm and weigh 180kg while black wildebeest females stand 108cm at the shoulder and weigh 155kg. The horns of blue wildebeest protrude to the side, then curve downwards before curving up back towards the skull, while the horns of the black wildebeest curve forward then downward before curving upwards at the tips. Blue wildebeest tend to be a dark grey color with stripes, but may have a bluish sheen. The black wildebeest has brown-coloured hair, with a mane that ranges in color from cream to black, and a cream-coloured tail. The blue wildebeest lives in a wide variety of habitats, including woodlands and grasslands, while the black wildebeest tends to reside exclusively in open grassland areas.[18] In some areas, the blue wildebeest migrates over long distances in the winter, whereas the black wildebeest does not.[27] The milk of the female black wildebeest contains a higher protein, lower fat, and lower lactose content than the milk of the blue wildebeest.[28]  Wildebeest can live more than 40 years, though their average lifespan is around 20 years.[29]