Plate 1 of Volume 4

Plate 1 of Volume 4
 
1. Tibetan Sandgrouse (Syrrhaptes tibetanus)
2. Pallas's Sandgrouse (Syrrhaptes paradoxus)
3. Pin-tailed Sandgrouse (Pterocles alchata)
4. Namaqua Sandgrouse (Pterocles namaqua)
5. Chestnut-bellied Sandgrouse (Pterocles exustus)
6. Spotted Sandgrouse (Pterocles senegallus)
7. Black-bellied Sandgrouse (Pterocles orientalis)