Winter ecology of a female White-backed Woodpecker Dendrocopos leucotos (Bechstein).

摘要

In the winter of 1977/78, a White-backed Woodpecker was observed in the archipelago of southwestern Finland 200 km from its breeding areas. It foraged on insects living in small dead alders and birches. The potential prey species were identified by rearing the insects from the trunks used by the White-backed Woodpecker. Altogether 628 adult insects emerged. In addition to the big larvae the potential food also included larvae of Sciaridae and Cecidomyidae (Diptera) living in dense clumps.