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

Hanne & Jens Eriksen / Arabian gazelle {Gazella gazella} and Chestnut-bellied sandgrouse {Pterocles exustus} drinking from pool of water, Oman

Hanne & Jens Eriksen / Chestnut bellied sandgrouse male drinking {Pterocles exustus} Jaaluni, Oman

Hanne & Jens Eriksen / Chestnut bellied sandgrouse {Pterocles exustus} male, collecting water in feathers, Jaaluni, Oman

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

Hanne & Jens Eriksen / Crowned sandgrouse (Pterocles coronatus), male, Mudday, Oman, january

Ashish & Shanthi Chandola / Chestnut-bellied sandgrouse ( Pterocles exustus), male, Rajasthan, India.

Ashish & Shanthi Chandola / Chestnut-bellied Sandgrouse ( Pterocles exustus), male with wel lcamouflaged chicks on stoney ground, Rajasthan, India, July

Ashish & Shanthi Chandola / Chestnut-bellied sandgrouse (Pterocles exustus), female, Rajasthan, India.

Lorraine Bennery / Pair of Madagascan sandgrouse (Perocles personatus), endemic to Madagascar.

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.

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...

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

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

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

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

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

Alain Dragesco-Joffe / Spotted sandgrouse (Pterocles senegallus) and Crowned sandgrouse (Pterocles coronatus) near a water hole in the morning .

Staffan Widstrand / Wild Wonders of China / Pallas's sandgrouse (Syrrhaptes paradoxus) flock in flight, Chaka, Tibetan Plateau, Qinghai, China

Staffan Widstrand / Wild Wonders of China / Pallas's sandgrouse (Syrrhaptes paradoxus) in flight, Chaka, Tibetan Plateau, Qinghai, China

David Tipling / Black-bellied sandgrouse (Pterocles orientalis) Belchite, Aragon, Spain July

David Tipling / Pin-tailed sandgrouse (Pterocles alchata) drinking at pool Belchite, Aragon, Spain, July

David Tipling / Pin-tailed sandgrouse (Pterocles alchata) drinking at pool Belchite, Aragon, Spain, July

David Tipling / Pin-tailed sandgrouse (Pterocles alchata) recently drinking at pool Belchite, Aragon, Spain, July

David Tipling / Black-bellied sandgrouse (Pterocles orientalis) drinking at pool, Belchite, Aragon, Spain, July

David Tipling / Black-bellied sandgrouse (Pterocles orientalis) in flight, Belchite, Aragon, Spain July

David Tipling / Black-bellied sandgrouse (Pterocles orientalis) two drinking at water, Belchite, Aragon, Spain July

David Tipling / Black-bellied sandgrouse (Pterocles orientalis) landing, Belchite, Aragon, Spain July

David Tipling / Pin-tailed sandgrouse (Pterocles alchata) landing Belchite, Aragon, Spain, July

David Tipling / Pin-tailed sandgrouse (Pterocles alchata) drinking at pool Belchite, Aragon, Spain, July

David Tipling / Pin-tailed sandgrouse (Pterocles alchata) drinking at pool Belchite, Aragon, Spain, July

David Tipling / Pin-tailed sandgrouse (Pterocles alchata) male walking profile, Belchite, Aragon, Spain, July

David Tipling / Black-bellied sandgrouse (Pterocles orientalis) drinking at pool, Belchite, Aragon, Spain July

David Tipling / Pin-tailed sandgrouse (Pterocles alchata) Belchite, Aragon, Spain, July

David Tipling / Pin-tailed sandgrouse (Pterocles alchata) male soaking breast feathers to carry water back to young, Belchite, Aragon, Spain, July

David Tipling / Pin-tailed sandgrouse (Pterocles alchata) two males soaking breast feathers to carry water back to young, Belchite, Aragon, Spain, July

David Tipling / Black-bellied sandgrouse (Pterocles orientalis) drinking at pool Belchite, Aragon, Spain July

David Tipling / Black-bellied sandgrouse (Pterocles orientalis) taking off, Belchite, Aragon, Spain July

David Tipling / Pin-tailed sandgrouse (Pterocles alchata) small flock drinking at pool Belchite, Aragon, Spain, July

Hanne & Jens Eriksen / Chestnut bellied sandgrouse (Pterocles exustus) flock in flight, Oman, February

Hanne & Jens Eriksen / Spotted sandgrouse (Pterocles senegallus) flock in flight, Oman, January

David Kjaer / Pin-tailed sandgrouse (Pterocles alchata) male, Spain, July

David Kjaer / Pin-tailed sandgrouse (Pterocles alchata) male drinking, Spain, July