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 / 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.

Mathias Schaef/ BIA / Pin-tailed Sandgrouse (Pterocles alchata) male, Israel

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 / 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