Some types of woodpecker
, such as the Pileated Woodpecker (dryocopus pileatus), actually do dig further
than just the surface
of trees. They use their bill to drill
deep into the tree
, often old pine trees, in order to carve out a cavity in which to build their nest
. You may also see them tapping at and removing the bark
around the entrance in order to make sap
flow across the surface. This is to make it harder for predators
to cling on while attacking the nest.
Some types of woodpecker also use their bill to hammer on trees as part of their courtship rituals and all use it to dig for food, such as termites.
To summarise, woodpeckers are craftsmen themselves, they carve out homes for their families and select mates on the quality of their carpentry.