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The western capercaillie (Tetrao urogallus), also known as the Eurasian capercaillie, wood grouse, heather cock, cock-of-the-woods, or simply capercaillie / ˌ k æ p ər ˈ k eɪ l (j) i /, [3] is a heavy member of the grouse family and the largest of all extant grouse species. The heaviest-known specimen, recorded in captivity, had a weight ...
Compared to the western capercaillie, it is slightly smaller in size with a slimmer body profile and longer neck, has a black beak (hence its name) instead of being horn-colored, and a longer, more spatulate tail. The eastern capercaillie has a somewhat glossy bluish-black head and neck down to a metallic turquoise breast.
The genus name is the Latin word for a game bird, probably a black grouse. [2] The black grouse was included by Linnaeus in the genus Tetrao but is now placed in the genus Lyrurus. [1] [3] The type species was designated as the western capercaillie (Tetrao urogallus) by George Robert Gray in 1840. [4] [5]
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Diseases and parasites have been proposed as factors associated with the decline of populations of other species within the same family of birds as the capercaillie (Tetraonidae). [ 12 ] : 191 In an attempt to determine if parasites were contributing to the decline of the Cantabrian capercaillie, researchers collected and analyzed fecal samples ...
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A posing western capercaillie Sage grouse lek mating arena, in which each male, alpha-male (highest ranking), beta-male, gamma-male, etc., guards a territory of a few meters in size. The dominant males may each attract eight or more females. [33] Higher-ranking individuals have larger personal space bubbles. [34] Bird leks may have 10-200 ...
A ruffed grouse found at the Kortright Centre for Conservation.. Grouse / ɡ r aʊ s / are a group of birds from the order Galliformes, in the family Phasianidae.Grouse are presently assigned to the tribe Tetraonini (formerly the subfamily Tetraoninae and the family Tetraonidae), a classification supported by mitochondrial DNA sequence studies, [2] and applied by the American Ornithologists ...