Paul Corfield
Well-known member
Certainly looks like they are moving in Dan. I put a new box up a few years ago and they spent a couple of weeks chipping away at the wood. They left the opening alone but were hammering away at the inside of the box. The box was hanging on the back of my studio wall and throughout the day I could hear hammering like a miniature woodpecker. Lots of people report this behavior and this is some text from the RSPB website.
"Tits are regularly seen hammering away at the entrance hole of a nestbox. This is probably a form of display by the male, rather than an attempt to enlarge the hole.
Later, the female will also peck vigorously: natural holes may have all the surrounding bark chipped away. This may help her to judge how soft the wood is and whether the hole will provide a safe, predator-proof home in which to raise her brood. Blue and great tits will also hammer at the inside of a box or nest hole, perhaps as a form of display."
Paul.
"Tits are regularly seen hammering away at the entrance hole of a nestbox. This is probably a form of display by the male, rather than an attempt to enlarge the hole.
Later, the female will also peck vigorously: natural holes may have all the surrounding bark chipped away. This may help her to judge how soft the wood is and whether the hole will provide a safe, predator-proof home in which to raise her brood. Blue and great tits will also hammer at the inside of a box or nest hole, perhaps as a form of display."
Paul.