nilgiri himalyan and arabian are types of tahr
Tahrs are three species of large Asian artiodactyl ungulates related to the wild goat. Until recently the three species were believed to be closely related and were placed in a single genus, Hemitragus. Genetic studies have proven that the three tahrs are not as closely related as previously thought. Now they are considered as members of three separate monotypic genera; Hemitragus is now reserved for the Himalayan Tahr; Nilgiritragus for the Nilgiri Tahr; and Arabitragus for the Arabian Tahr.
Tahr