What is "bonasa betulina"

Grouse \Grouse\ (grous), n. sing. & pl. [Prob. after the analogy of mouse, mice, fr. the earlier grice, OF. griesche meor hen: cf. F. piegri[`e]che shrike.] (Zo["o]l.) Any of the numerous species of gallinaceous birds of the family Tetraonid[ae], and subfamily Tetraonin[ae], inhabiting Europe, Asia, and North Americ

1. They have plump bodies, strong, well-feathered legs, and usually mottled plumage. The group includes the ptarmigans ( Lagopus), having feathered feet.

   Note: Among the European species are the red grouse ( Lagopus Scoticus) and the hazel grouse ( Bonasa betulina). See Capercaidzie, Ptarmigan, and Heath grouse. Among the most important American species are the ruffed grouse, or New England partridge ( Bonasa umbellus); the sharp-tailed grouse ( Pedioc[ae]tes phasianellus) of the West; the dusky blue, or pine grouse ( Dendragapus obscurus) of the Rocky Mountains; the Canada grouse, or spruce partridge ( D. Canadensis). See also Prairie hen, and Sage cock. The Old World sand grouse ( Pterocles, etc.) belong to a very different family. See Pterocletes, and Sand grouse.

Hazel \Ha"zel\ (h[=a]"z'l), n. [OE. hasel, AS. h[ae]sel; akin to D. hazelaar, G. hazel, OHG. hasal, hasala, Icel. hasl, Dan & Sw. hassel, L. corylus, for cosylus.]

1. (Bot.) A shrub or small tree of the genus Corylus, as the Corylus avellana, bearing a nut containing a kernel of a mild, farinaceous taste; the filbert. The American species are Corylus Americana, which produces the common hazelnut, and Corylus rostrata. See Filbert.
   --Gray.

2. A miner's name for freestone.
   --Raymond.

   Hazel earth, soil suitable for the hazel; a fertile loam.

   Hazel grouse (Zo["o]l.), a European grouse ( Bonasa betulina), allied to the American ruffed grouse.

   Hazel hoe, a kind of grub hoe.

   Witch hazel. See Witch-hazel, and Hamamelis.