The Hazel Grouse

It is the smallest and most discreet of the mountain Galliformes species. Being an exclusively forest-dwelling spieces, it is much less well-known than the Lyre Grouse or the Rock Ptarmigan!
Yet it is also important from a biological and scientific point of view: it is an environmental change indicator species. It's quite picky in its needs for vegetation and variety of tree species. Degraded and badly managed forests jeopardise its survival, which is one of the main causes of the species' decline.