Ole Jorgen Liodden / Common moorhen (Gallinula chloropus) perched on branch, Lake Naivasha, Kenya.

Ole Jorgen Liodden / Hippopotamus (Hippopotamus amphibius) rearing head out of water, creating spray, Lake Naivasha, Kenya.

Chase Dekker / Hippopotamus (Hippopotamus amphibius) juvenile, Lake Naivasha, Kenya

Melvin Grey / Spur-winged plovers (Hoplopterus spinosus) adults in courtship display, Lake Naivasha, Kenya

Denis-Huot / Close up of male Guereza colobus (Colobus guereza), Lake Naivasha, Kenya.

Denis-Huot / Two Guereza colobus monkeys (Colobus guereza) grooming, Lake Naivasha, Kenya.

Melvin Grey / Crowned plover (Vanellus coronatus) adult male display in rough grassland. Lake Naivasha, Kenya

Melvin Grey / Green wood hoopoe (Phoeniculus purpureus marwitzi) adult male hunting insects. Lakeside Fever Trees. Lake Naivasha, Kenya.

Melvin Grey / Three-banded plover (Charadrius tricollaris) adult feeding along muddy margins. Lake Naivasha, Kenya

David Pattyn / Malachite kingfisher (Alcedo cristata) perched on a papyrus stem, Lake Naivasha, Rift Valley Province, Kenya, Africa, August.

David Pattyn / Malachite kingfisher (Alcedo cristata) perched on a papyrus stem, Lake Naivasha, Rift Valley Province, Kenya, Africa, August.

Melvin Grey / Two Hybrid lovebirds (Agapornis fischeri x A. personatus) Lake Naivasha, Kenya. The hybrids are the result of interbreeding between the native Yellow colllard lovebird (Agaoprnis personatus) and the...