Tetrao urogallus is the scientific name for the Western Capercaillie, a large bird found in Eurasia. There are several synonyms for this species, including "wood grouse," "great capercaillie," and "cock of the woods." These synonyms help to clarify the various common names that have been used for this bird over the years. The Western Capercaillie is known for its striking appearance, with a metallic green and blue plumage on the males and a more subdued brown and black coloration on the females. Despite being a popular game bird in some regions, the Western Capercaillie is considered vulnerable due to habitat loss and hunting pressure.