Bovidae

Bovidae is the biological family of cloven-hoofed, ruminant mammals that includes cattle, bison, buffalo, antelopes, and goat-antelopes such as sheep and goats. There are 143 extant species and 300 known extinct species of bovids, which are divided into either 11 major subfamilies, or two subfamilies with 13 tribes. The earliest known bovid had evolved by 20 million years ago, in the early Miocene. The bovids show great variation in size and colouration of their fur. With exceptions in some domesticated forms, all male bovids have two or more horns, and in many species, females possess horns too. The size and shape of the horns vary greatly, but the basic structure is always one or more pairs of simple, unbranched, bony protrusions of the skull covered in a permanent sheath of keratin, and often with a spiral, twisted, or fluted shape, Most bovids bear 30 to 32 teeth. Most bovids are diurnal: social activity and feeding usually peak during dawn and dusk. Bovids typically rest before dawn, during midday, and after dark. They have various methods of social organisation and social behaviour, which are classified into solitary and gregarious behaviour. Bovids use different forms of vocal, olfactory, and tangible communication. Most species alternately feed and ruminate throughout the day. While small bovids forage in dense and closed habitat, larger species feed on high-fiber vegetation in open grasslands. Most bovids are polygynous. Mature bovids mate at least once a year and smaller species may even mate twice. In some species, newborn or neonate bovids remain hidden for a week to two months, regularly nursed by their mothers; in other species, neonates are followers, accompanying their travelling mothers shortly after birth. The greatest diversities of Bovidae occur in Africa. The maximum concentration of species is in the savannas of Eastern Africa. Other bovid...