Children (28 direct children, 46 direct and indirect children):
Western capercaillie
(tree size 14)
Capercaillie
Tetrao parvirostris
Black-billed capercaillie
Caucasian grouse
Tetrao mlokosiewiczi
Tetrao tetrix
(tree size 2)
Black grouse
Tetrao canadensis
Tetrao chinensis
Black-billed capercaillie
(tree size 2)
Tetrao urogalloides
Tetrao afer
Tetrao californicus
California quail
Tetrao bonasia
Tetrao curvirostris
Tetrao dresseri
Tetrao hibernicus
Tetrao ocellatus
Tetrao coturnix
Tetrao mutus
Tetrao capensis
Tetrao cinereus
Tetrao cupido
Tetrao madagarensis
Tetrao paradoxa
Tetrao suscitator
Tetrao bicalcaratus
Tetrao caspius
Tetrao scoticus
Tetrao pondicerianus
Tetrao urophasianus
Tetrao variegatus