How many kinds of gnus are there?

There are two main species of gnus, also known as wildebeests: the black wildebeest (Connochaetes gnou) and the blue wildebeest (Connochaetes taurinus). The black wildebeest is primarily found in South Africa, while the blue wildebeest is more widespread across eastern and southern Africa. Both species are known for their distinctive appearance and play significant roles in their ecosystems.