They frequently roost in old woodpecker holes, with oak and ash seeming to be the most important to the species.

You see that old tree at the crossroads, the one with the woodpecker holes in it?

In fact, those birds often live in deserted woodpecker holes.

They usually nest in a tree cavity and will often use old woodpecker holes.

It nests in tree cavities, especially old woodpecker holes.

I haven't heard any woodpeckers recently, but could this still be a new woodpecker hole?

Pairs nest in an old woodpecker hole in March.

They make a cup nest in a tree cavity or old woodpecker hole.

They nest in tree cavities, usually being old woodpecker holes.

One has woodpecker holes in the side.