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

Mathias Schaef/ BIA / Crowned Sandgrouse (Pterocles coronatus) group at waterhole in desert, Gan HaDarom, Israel

Mathias Schaef/ BIA / Crowned Sandgrouse (Pterocles coronatus) male, Gan HaDarom, Israel

Mathias Schaef/ BIA / Crowned Sandgrouse (Pterocles coronatus) female drinking at waterhole, Gan HaDarom, Israel

Mathias Schaef/ BIA / Crowned Sandgrouse (Pterocles coronatus) male, Gan HaDarom, Israel

Hanne & Jens Eriksen / Crowned sandgrouse (Pterocles coronatus) male showing tail in display, Oman, January

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

Rosl Roessner / Crowned Sandgrouse (Pterocles coronatus) male, Morocco

Gertrud & Helmut Denzau / Crowned Sandgrouse (Pterocles coronatus atratus) male and female on the ground, Touran Protected Area, now part of Khar Turan National Park, Semnan Province, Iran

Gertrud & Helmut Denzau / Crowned Sandgrouse (Pterocles coronatus atratus) male, bathing in small stream, Touran Protected Area, now part of Khar Turan National Park, Semnan Province, Iran

Gertrud & Helmut Denzau / Crowned Sandgrouse (Pterocles coronatus atratus) male, Touran Protected Area, now part of Khar Turan National Park, Semnan Province, Iran

Hanne & Jens Eriksen / Crowned sandgrouse {Pterocles coronatus} male in desert, Oman, March

Hanne & Jens Eriksen / Crowned sandgrouse {Pterocles coronatus} two males and female in desert, Oman, March

Hanne & Jens Eriksen / Crowned sandgrouse {Pterocles coronatus} male collecting water for chicks in breast feathers, Jaaluni, Oman

Hanne & Jens Eriksen / Crowned sandgrouse {Pterocles coronatus} male collecting water for chicks in breast feathers, Jaaluni, Oman

Hanne & Jens Eriksen / Crowned sandgrouse {Pterocles coronatus} male and females drinking, Jaaluni, Oman

Hanne & Jens Eriksen / Crowned sandgrouse (Pterocles coronatus) drinking. Tudhu, Oman.

Hanne & Jens Eriksen / Crowned sandgrouse (Pterocles coronatus) male soaking feathers with water for chicks. Tudhu, Oman.

Bruno D'Amicis / Crowned sandgrouse (Pterocles coronatus) adult male. Central Morocco. NW Africa

Hanne & Jens Eriksen / Crowned sandgrouse {Pterocles coronatus} male and female pair walking, Oman.

Hanne & Jens Eriksen / Crowned Sangrouse {Pterocles coronatus} with beak in water, Jaaluni, Oman.

Hanne & Jens Eriksen / Crowned Sangrouse {Pterocles coronatus} in flight, Jaaluni, Oman.

Hanne & Jens Eriksen / Crowned Sandgrouse {Pterocles coronatus} taking off from water, Jaaluni, Oman.

Hanne & Jens Eriksen / Male Crowned sandgrouse at waterhole {Pterocles coronatus}, Jaaluni, Oman, May

Mathias Schaef/ BIA / Crowned Sandgrouse (Pterocles coronatus) male in waterhole, Gan HaDarom, Israel

Roland Seitre / Crowned sandgrouse (Pterocles coronatus) flock standing at water's edge, Sinai, Israel.

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

Avi Meir/ BIA / Crowned Sandgrouse (Pterocles coronatus) female drinking, Negev, Israel