The European green woodpecker (Picus viridis) is our largest woodpecker. Although it nests in a hole in a tree it spends a lot of time on the ground hunting for ants and has a long sticky tongue for collecting them.
Green woodpecker numbers are increasing
but it is less common here in the north of the country.
In Thomas Bewick's time the green woodpecker was only the second largest British woodpecker (he records the black woodpecker as a resident bird!). This is the male green woodpecker from his 1797 A History of British Birds.
You can read more about the green woodpecker here. Listen to a recording of the yaffle here. And listen to Kate Humble's BBC Radio 4 Tweet of the Day on green woodpecker here.