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The spruce grouse (Canachites canadensis), also known as Canada grouse, spruce hen or fool hen, [2] [3] is a medium-sized grouse closely associated with the coniferous boreal forests or taiga of North America. It is the only member of the genus Canachites.
Greater sage-grouse at a lek, with multiple males displaying for the less conspicuous females. A lek is an aggregation of male animals gathered to engage in competitive displays and courtship rituals, known as lekking, to entice visiting females which are surveying prospective partners with which to mate. [1]
Male grouse tend to be larger than female grouse, [9] which seems to hold true across all the species of grouse, with some difference within each species in terms of how drastic the size difference is. [9] The hypothesis with the most supporting evidence for the evolution of sexual dimorphism in grouse is sexual selection. [9]
Cats have anal sacs or scent glands. Scent is deposited on the feces as it is eliminated. Unlike intact male cats, female and neutered male cats usually do not spray urine. Spraying is accomplished by backing up against a vertical surface and spraying a jet of urine on that surface. Unlike a dog's penis, a cat's penis points backward. Males ...
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While cats mark their territory both by rubbing the scent glands, by urine and fecal deposits, spraying seems to be the "loudest" feline olfactory communication. It is most frequently observed in intact male cats in competition with other males. Males neutered in adulthood may still spray after neutering. Female cats also sometimes spray. [7]
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 ...
In 2014, it was split by the IUCN as a distinct species from the spruce grouse Canachites canadensis after being considered a subspecies. However, as of early 2021 the International Ornithological Congress (IOC) [2], the American Ornithological Society [3], and the Clements taxonomy [4] retain C. f. franklinii and C. f. isleibi as subspecies of spruce grouse.