Has the number of European robins Erithacus rubecula wintering in Spain decreased?
Ha disminuido el número de petirrojos Erithacus rubecula invernantes en España?
This paper explores the
numerical trends of winter ring recoveries of the European robin Erithacus rubeculain Spain to
determine whether the number of extra-Iberian individuals has decreased in
recent decades. Results show that despite the increasing numbers of ringed and
controlled robins, the number of recoveries of individuals of northern origin
has decreased since the 1970s. This pattern is congruent with the northwards
retreat of the wintering grounds of some partially migratory bird species that
may be due to global warming.