At one time Egypt had a cooler, wetter climate than it has today; ancient tomb paintings show giraffes, hippopotamuses, crocodiles and ostriches, and the petroglyphs at Silwa Bahari on the upper Nile, between Luxor and Aswan, show elephants, white rhinoceroses, gerenuk and more ostriches, a fauna akin to that of present-day East Africa. Nor does the country have many endemic species, these being limited to the Egyptian weasel, pallid gerbil, Mackilligin's gerbil (this may possibly extend into the Sudan), Flower's shrew, Nile Delta toad, and two butterflies, the Sinai baton blue and "Satyrium jebelia".