One of the birds more characteristic of the mountainous areas is the Wallcreeper (Trichodroma muraria), in the winter is not difficult to be able to locate birds outside their breeding areas, in Spain are in cliffs of Picos de Europa and the Pyrenees.
All winter is possible to find birds in the same places, for example, during these days they have been possible to see two birds in the La Yecla, a singular natural space with two birds during all winter.
Also, recently other Wallcreepers in other places have been located, possibly moving towards the breeding areas.