This guide is based on wikipedia's list of birds of Germany with accidentals removed to keep the guide under 500 entries.
The 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.