Back ديك الخلنج Arabic ديك الخلنج ARZ Lambey (Tetrao) AVK Tetrao Breton Tetrao Catalan Tetrao CEB Tetřev Czech Auerhühner German Tetraono Esperanto Tetrao Spanish
| Tetrao Temporal range: Early Pliocene to recent
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|---|---|
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| Western capercaillie (Tetrao urogallus) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Galliformes |
| Family: | Phasianidae |
| Tribe: | Tetraonini |
| Genus: | Tetrao Linnaeus, 1758 |
| Type species | |
| Tetrao urogallus Linnaeus, 1758
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| Species | |
Tetrao is a genus of birds in the grouse subfamily known as capercaillies. They are some of the largest living grouse. Feathers from the bird were used to create the characteristic hat of the bersaglieri, an Italian ace infantry formation.