In summer the chamois (Rupicapra rupicapra) can be found at the shady and higher spots, while in winter they descend and look for the sunnier parts. The red deer (Cervus elaphus) and roe deer (Capreolus capreolus), which died out many years ago, have returned thanks to the reintroductions undertaken in the last 50 years. The roe deer formed large populations till a few years ago, a disease decimated the community. The red deer is almost omnipresent and offers spectacular concerts during the rut in September.
Other interesting mammals are the pine marten (Martes martes), the ermine (Mustela erminea), the alpine marmot (marmota marmota) - appearing in recent years - or the pygmy white-toothed shrew (Suncus etruscus). At present the wolf (Canis lupus) has returned with little observations since 2003.
Among the birds we have to draw the attention to the large birds of prey such as the bearded vulture (Gypaetus barbatus), the golden eagle (Aquila chrysaetos) or the griffon vulture (Gyps fulvus).
We can also find remindings of the glacial periods such as the black woodpecker (Dryocopus martius), the latter chosen as a symbol of the nearby Natural Park Cadí-Moixeró. Other important species are the grey partridge (Perdix perdix), the wallcreeper (Tichodroma muraria), the white throated dipper (Cinclus cinclus), the ring ouzel (Turdus torquatus), the northern wheatear (Oenanthe oenanthe), the red crossbill (Loxia curvirostris), the snow finch (montifringilla nivalis) and the boreal owl (Aegolius funereus), among many others.
Two species of moist habitats, vividly coloured are relatively easy to spot: the green lizard (Lacerta viridis), green and bright, and the western whip snake (Coluber viridiflavus). Others such as the asp viper (Vipera aspis) and the Southern smooth snake (Coronella girondica) are more difficult to observe.
Among the amphibians we emphasize on the Pyrenean mountain newt (Euproctus asper), which is endemic in these mountains and inhabits streams of cold and oxygenated water, the common frog (Rana temporaria) that sometimes can be found far from the water and the midwife toad (Alytes obstetricans) with its unmistakable yell.
Because of the few watercourses and ponds existing in the Catllaràs (its limestone soil lets the water soak away), there are only three species of fish: trout (Salmo trutta), the Mediterranean barbell (Barbus meridionalis) and the minnowl (phoxinus phoxinus).