Grey-headed woodpecker – Picus canus

It is 25–28 cm long and weighs 130-180 grams. Its plumage closely resembles its near relative the European green woodpecker. It has green upperparts, pale grey underparts and a yellow rump. It has a grey head with black moustache, and the male has a red crown. It has a shorter neck, slimmer bill and slightly rounder head than the green woodpecker. Grey-headed woodpeckers live in leaf forests and mixed forests

It sounds like this
Recording by Elias A. Ryberg from Xeno canto