Male Black grouse on their springtime leking ground viciously fighting each other, showing one bird plucking the feathers out of it's opponent's breasts

black grouse grouse birding game bird mating courting birds plumage blackcock fighting birds mating season beak cock wildlife male birdwatching hunt ornithology breeding lek tetrao tetrix bird lekking natural habitat animal leksite fight environment fauna display early morning wilderness action wild nature flight springtime background early season spring feather fighting game morning tetrix lyrurus tetrix black eyebrow