Black woodpecker – Dryocopus martius
is a large woodpecker that lives in mature forest across the northern palearctic. It is the sole representative of its genus in that region. Its range is expanding in Eurasia. It does not migrate. This species is closely related to and fills the same ecological niche in Europe as the pileated woodpecker of North America. The black woodpecker is mainly found in forested regions, with a preference for extensive, mature woodland, including coniferous, tropical, subtropical and boreal forests. It is very widespread throughout mountainous and lowland forests. It is more likely to occur in marginal woods near human habitations during the non-breeding season.

It sounds like this
Recording by PE Svahn from Xeno-canto