(Tetraonidae; Ϯ Ruffed Grouse B. umbellus) Mod. L. bonasa or bonasia  Hazel Hen  < Italian name Bonasia for the Hazel Hen  < L. bonasus  type of maned bull   < Gr. βονασος bonasos  aurochs, bison, bull (see bonasia); "BONASA.  HEATHCOCK.  ...  SHOULDER-KNOT HEATHCOCK. (Bonasa Umbellus.)  ...  its manners greatly resemble those of the Black Grous: the male placing himself upon some elevated stump, when he commences his peculiar noise called thumping, by flapping his wings against his sides: he begins the strokes gradually, at about two seconds of time from each other, and repeats them quicker and quicker, until they make a noise not unlike distant thunder. This continues from the beginning about a minute; the bird ceases for six or eight minutes, and then begins again ...  during the operation the crests on his head and sides of the neck are elevated, and the tail is expanded to its utmost  ...  They are called Drumming Partridges in some parts of North America; and at Hudson's Bay pushee or pupushee" (Stephens 1819): based on "Attagen Pensilvaniæ" and "Bonasa major Canadensis" of Brisson 1760, and Tetrao umbellus Linnaeus, 1766; "Bonasa Stephens, in Shaw, Gen. Zool., 9, pt. 2, 1819, p. 298. Type, by subsequent designation, Tetrao umbellus Linné. (A. O. U. Committee 1886.)" (Peters 1934, II, 39).
Synon. Bonasia, Hylobrontes, Tetrastes.

L. umbella  parasol, umbrella  < dim. umbra  shade (cf. umbo, umbonis  swelling, knob, shield-boss).
● "cervicale umbone exstante" (Linnaeus 1766); ex “Ruffed Heath-cock or Grous” of Edwards 1758, and "Attagen pensylvaniae" of Brisson 1760 (Bonasa).