Lyrurus tetrix

- Plumage: Male glossy blue-black body plumage contrasting sharply with pure white wing bars, white underwing coverts, and white undertail feathers. - Beak: Short, stout, slightly curved black bill. - Body build: Medium-sized grouse (length 40–55 cm) with a compact build and specialized tail mechanics. - Distinctive details: Distinctive lyre-shaped outer tail feathers (rectrices) curving outwards, bright red fleshy skin comb above the eye.

This species is an important part of the ecosystems in Västerbotten.