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