Woodpeckers will dig a new nest every year, which provides suitable nesting holes for other hole birds. Both male and female work together in this hard task, that might take them three or four weeks to complete.
She worked away while I took photos, and filmed her, and she was still working when I left.
The female on the high branches of a horse chestnut, with buds about to burst
most of the shots I took of chiselling are blurry, but this one captured the moment of impact, and the closed eyes of the woodpecker at this point.
A short clip follows.