Birds Of Nairobi National Park! As I sat thinking of the amazing diversity of bird species in the tiny Nairobi National Park, the idea came to me to check the global records. Well, a bit of quick research revealed that there are just over 10,000 bird species on Earth and about 2,500 species in Africa and about 1,500 species in East Africa, and over 500 species of birds (permanent & seasonal) in the tiny 117 square kilometer little Nairobi National Park.