Konstantin Mikhailov / Pallas's sandgrouse (Syrrhaptes paradoxus) group of four flying against blue sky, Gobi Desert, Mongolia, August.

Oscar Diez / Pin-tailed Sandgrouse (Pterocles alchata) male, Castile-La Mancha, Spain

Melvin Grey / Chestnut-bellied sandgrouse (Pterocles exustus olivascens) male. Ndutu, Tanzania.

Melvin Grey / Black-faced sandgrouse (Pterocles decoratus) pair standing, reflected in pool. Meru National Park, Kenya.

Melvin Grey / Chestnut-bellied sandgrouse (Pterocles exustus olivascens) pair in flight. Meru National Park, Kenya.

Melvin Grey / Chestnut-bellied sandgrouse (Pterocles exustus olivascens) male soaking feathers to provide chicks at nest with water. Meru National Park, Kenya.

Melvin Grey / Yellow-throated sandgrouse (Pterocles gutturalis saturatior) male. Ndutu, Tanzania. Medium repro only.

Winfried Wisniewski / Burchell's Sandgrouse (Pterocles burchelli) in waterhole, Kgalagadi Transfrontier Park, South Africa

Staffan Widstrand / Wild Wonders of China / Pallas's sandgrouse (Syrrhaptes paradoxus) male, walking on ground in Inner Mongolia, China

Staffan Widstrand / Wild Wonders of China / Pallas's sandgrouse (Syrrhaptes paradoxus) male walking on ground, Inner Mongolia, China

Staffan Widstrand / Wild Wonders of China / Wildlife warning sign 'Wildebeest come out at night. Don't go out Alone'. This is likely a mistranslation of the world for Takin, which is similar to the word for Wildebeest Tangjiahe Nati...

Alain Dragesco-Joffe / Spotted sandgrouse (Pterocles senegallus) female drinking at waterhole, Sahara.