A small woodpecker with black-and-white markings, seen throughout the year in Japan from lowlands to low mountains.
The sexes look much alike. Males have red feathers at the back of the head, but these are usually difficult to see.
The Japanese Pygmy Woodpecker excavates holes in trees for nesting and roosting. From 2006 to 2010, researchers studied part of a natural forest in Sapporo, Hokkaido. Among the 50 trees with cavities they recorded, eight had nest holes, ten had roost holes, and 32 had old cavities. They compared these with 280 unused trees. The woodpeckers tended to use larger, more decayed trees.
Prominent birches and oaks were less often selected than particular tree species, especially alders. For example, alder Alnus hirsuta accounted for 15 used trees and eight unused trees. The authors proposed that small woodpeckers may choose softer, decayed wood because their excavation ability is limited.
IUCN Red List · Least Concern (LC) · Global
The 2024 global IUCN Red List assessment lists the Japanese Pygmy Woodpecker as Least Concern (LC), while its population trend is assessed as decreasing.
Japan's Fifth Red List lists Orii's Pygmy Woodpecker (Yungipicus kizuki orii), an Iriomote subspecies, as Endangered (EN). Habitat loss from logging and river development is cited as a concern.