European green woodpecker but is made sticky by secretions from the enlarged salivary glands. Heavy, prolonged snow cover makes feeding difficult for the green woodpecker and can result in high mortality, from which it may take 10 years for the population to recover. Ant nests can be located under the snow; one bird was observed to dig 85 cm to reach a nest. 'Professor Yaffle', the wooden bookend character in the 1974 children's animation series "Bagpuss", was based loosely upon the green woodpecker. 'Yaffle' was among many English folk names for the European green woodpecker relating to its laughing call; others include laughing
Tristram's woodpecker Tristram's woodpecker The Tristram's woodpecker (kor.: 크낙새 khunak-sae, jap.: Kitataki) ("Dryocopus javensis richardsi") is a Korean subspecies of the white-bellied woodpecker. It was firstly identified and described by English scholar and ornithologist Henry Baker Tristram in 1879. The Tristram's woodpecker, with its 46 cm length, is among the largest woodpeckers. Both the tuft and the cheek patches are crimson red; its upper parts are black, which contrast with its white underparts, wing tips and a white rump. It has four toes of which two are directed backwards. Its tailfeathers are firm. Its native name was derived from the strange call