yellow-bellied sapsucker (sphyrapicus varius). a female yellow-bellied sapsucker scours the trunk of a birch tree in search of

adult animal avian backyard bark beak beautiful behavior bellied bill biodiversity birch bird birding birdwatching black canada common detail eye fauna feather feeding forests holes hungry insects male may mixed month ontario ornithology perched pools sap sapsucker scours sight sphyrapicus tree trunk varius woodpecker