primary hole nesters
Knocking
The big black woodpecker doggedly knocks with its beak. It chips away pieces of bark in all directions. It carves out its own hole in dead or dying trees. Aspens are particularly favoured.
Chiseling
The crested tit also chisels out its own hole, always in dead trees with soft wood, since its beak is tiny and weak. Inside the wood live many insects, which the birds gladly eat.
Primary hole nesters
Hole-nesting birds that make their own holes are called "primary hole-nesting birds". The black and green woodpeckers, great and smaller spotted woodpeckers are all good examples. And also some species of titmice: crested tid, willow tit and Siberian tit.
