Black Grouse;Lyrurus tetrix) mating on snow in the Vaud Pre-Alps, Switzerland.

tetrao tetrix lyrurus tetrix mountain snow spring adult couple flap wings overview mating three quarter shot black grouse lyrurus tetrix lyrurus prealps mountain range hen cock may vaud canton of nobody mountains snow covered snowy springtime adults flapping wings flaps wings flutter overviews global sight global sights full length couple to sexual intercourse copulation copulate coupling up coupled coupling copulations copulating sexual intercourses cover to couplings up three quarter views three quarter view three quarter shots three quarter sight three quarter sights three quarter length black grouses lyrurus tetrix prealps massif hens cocks rooster roosters least concern species with nobody area solid precipitation precipitation 2 meteorological phenomenon meteorology science temperate season seasons ambiance stage of development individual pair enumeration locomotion motion shot sexual reproduction reproduction species grouse tetras gallinacean bird sauropsid vertebrate chordate wild animal animal tetraonidae galliformes aves sauropsida tetrapoda tetrapodomorpha rhipidistia sarcopterygii euteleostomi gnathostomata vertebrata chordata deuterostomia coelomata bilateria metazoa opisthokonta eukaryota alps range world mountain and summit female male low risk iucn) lr iucn red list of threatened species switzerland europe