1) Bird family 2) Family tetraonidae 3) Grouse 
the grouse family, a bird family (order Galliformes) that includes the grouse and the ptarmigan (qq.v.).
Tetraonidae is the Partridge and Grouse family of birds of the order Gallinae. They are characterized by the hind toe placed higher than the others, short and weak, or altogether wanting. The tarsi are generally spurred. The tail is short and of twelve feathers or more.
[n] - grouse
family Tetraonidae noun grouse