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

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.

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

Christine Jung / Chestnut-bellied Sandgrouse (Pterocles exustus), Mirbat, Oman

Thomas Rabeil / Chestnut Bellied Sandgrouse (Pterocles exustus) on sandy ground at seasonal waterhole. Dilia Achetinamou, Termit Tin Toumma National Park, Sahelo-Saharan Biome, Niger.

Thomas Rabeil / Group of Chestnut Bellied Sandgrouse (Pterocles exustus) in flight at seasonal waterhole. Dilia Achetinamou, Termit Tin Toumma National Park, Sahelo-Saharan Biome, Niger.

Thomas Rabeil / Chestnut Bellied Sandgrouse (Pterocles exustus) standing on sand. Dilia Achetinamou, Niger, Africa.

Hanne & Jens Eriksen / Chestnut bellied sandgrouse {Pterocles exustus} male and female at water, Oman, March

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

Hanne & Jens Eriksen / Flock of Chestnut-bellied sandgrouse {Pterocles exustus} at waterhole, Jaaluni, Oman, May

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

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

Hanne Jens Eriksen / Male Chestnut bellied sandgrouse {Pterocles exustus} taking off from pond, Oman,

Anup Shah / Flock of Chestnut bellied sandgrouse at water {Pterocles exustus} Serengeti NP, Tanzania.

Anup Shah / Flock of Chestnut bellied sandgrouse at water {Pterocles exustus} Serengeti NP, Tanzania.

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) male, standing at water's edge, Lac de Guiers, Ferlo, Senegal.

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.