Hippopotamus. The hippo's large 'yawn' does not mean the hippo is tired, it is one of their most aggressive forms and shows confrontation in the water. They will spend most of their day in water deep enough to cover them because their thin, naked skin is vulnerable to overheating and dehydration. They will migrate to land for night feeding. Sunset in the Okavango Delta, Botswana Africa.
Copyright Barry Boscoe @ 2007