Birds rest on the back of a kudu in Moremi Game Reserve of Okavango Delta, northwest Botswana, Oct. 11, 2015. Botswana's Okavango Delta was listed as the 1,000th site inscribed on the World Heritage List in 2014. The Delta, about 40 kilometers from Tsodilo Hills, comprises permanent marshlands and seasonally flooded plains. It is one of the very few major interior delta systems that do not flow into a sea or ocean, with a wetland system that is almost intact. (Xinhua/Lyu Tianran)
