Also extremely rare is the wolf, of which 15 to
20* are reported to live in the national park. More numerous, though
well hidden, are small carnivores such as the genet, marten, wild cat,
stoat, otter, fox, badger, polecat, and weasel. Wild boars are not often
seen, but patches of earth they have turned over whilst foraging for
roots in pastures are a common sight. Several species of bat live in the
Picos de Europa, some of them roosting in the limestone caves, and are
often to be seen on the wing at dusk. Roe deer can be seen in the
woodlands, where there are also occasional sightings of red squirrel,
their red so dark they appear almost black. Red deer roam the forests of
Sajambre.