Rap-A-Tap, Tap

Somebody's building a house today,
Rap-a-tap, tap, tap, tap!
In the old oak tree across the way,
Rap-a-tap, tap, tap, tap!
Somebody circles about the trees,
Swoops high or low with the greatest ease.
Rap-a-tap, tap,
Rap-a-tap, tap,
Rap-a-tap, tap, tap, tap!

Somebody's nest we can never see,
Rap-a-tap, tap, tap, tap!
Hidden away in the old oak tree,
Rap-a-tap, tap, tap, tap!
Somebody's making a door so round,
As chips go flying down to the ground.
Rap-a-tap, tap,
Rap-a-tap, tap,
Rap-a-tap, tap, tap, tap!

I've got one question to ask of you,
Rap-a-tap, tap, tap, tap!
Give me your answer and tell me true,
Rap-a-tap, tap, tap, tap!
Who is this somebody? Can you guess?
If you say "woodpecker," I'll say, "Yes!"
Rap-a-tap, tap,
Rap-a-tap, tap,
Rap-a-tap, tap, tap, tap!