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

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.

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 / Chestnut bellied sandgrouse (Pterocles exustus) juvenile feeding, Oman, May

Joel Sartore / Photo Ark / Chestnut-bellied sandgrouse (Pterocles exustus erlangeri) pair, portrait, Wadi Al Safa Wildlife Center, Dubai. Captive.

Roland Seitre / Chestnut-bellied sandgrouse (Pterocles exustus) flock taking flight, Lac de Guiers, Ferlo, Senegal.

Roland Seitre / Chestnut-bellied sandgrouse (Francolinus erckelii) standing on bare ground, Waikoloa village, Big Island, Hawaii.

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.