La ptarmigan is a bird that let hardly surprising because white winter plumage, which makes it invisible to their enemies, and mottled brown in spring, blending with the vegetation. It is a unique subspecies of Pyrenean mountain and its nesting habitat is among the 2,200-2.300m at La Ribagorza.

You can find it in Macizo de Cotiella and the Macizo de los Montes Malditos (Cursed Mountains).