The willow ptarmigan (/ˈtɑːrmɪɡən/ TAR-mi-gun); Lagopus lagopus) is a bird in the grouse subfamily Tetraoninae of the pheasant family Phasianidae. It is...

440–640 g (15+1⁄2–22+1⁄2 oz). It is smaller than the willow ptarmigan by about ten percent. The rock ptarmigan is seasonally camouflaged; its feathers moult...

by the French zoologist Mathurin Jacques Brisson in 1760 with the willow ptarmigan (Lagopus lagopus) as the type species. The genus name Lagopus is derived...

monophyletic, with the rock ptarmigan (Lagopus muta) and White-tailed ptarmigan being sister species. The position of the willow ptarmigan (Lagopus lagopus) is...

Canadian High Arctic to refer to the feces of the rock ptarmigan (Lagopus muta) and the willow ptarmigan (Lagopus lagopus), which are considered a delicacy...

movements; many individuals of the ptarmigan (called rock ptarmigan in the US) and willow grouse (called willow ptarmigan in the US) migrate hundreds of kilometers...

Britain and Ireland. It is usually classified as a subspecies of the willow ptarmigan but is sometimes considered to be a separate species, Lagopus scoticus...

summer is very short, remain white all year round. Arctic fox Rock ptarmigan Willow ptarmigan Snowshoe hare Stoat Long-tailed duck Chameleons - Colour change...

grouse Siberian grouse Black grouse Black-billed capercaillie Willow ptarmigan Rock ptarmigan Daurian partridge Japanese quail Ring-necked pheasant Sika...

Einar; Høidal, Karsten (1992). "Cryptic Behaviour in Moulting Hen Willow Ptarmigan Lagopus l. lagopus during Snow Melt". Ornis Scandinavica. 23 (1): 101–104...