This is what a Hairy Woodpecker nest cavity might look like if we could see through the tree. Hairy Woodpeckers prefer dead conifers or Aspen to nest in. The male and female both excavate the cavity, which takes about 2-3 weeks to complete.
The female will lay 4 eggs, incubate for about 14 days and brood for about 12 days after the eggs hatch; pair taking turns during the day and males at night. The young will leave the nest about 28-30 days after hatching.