The Pygmy Woodpecker (Yungipicus kizuki) is the smallest woodpecker in Japan, measuring about 14–15 cm in length and weighing 18–26 g. It is found throughout the country. A resident species (non-migratory), it can be observed year-round from lowlands to foothill forests. Its plumage is characterized by brown and white barring, and males are distinguished by a small patch of red feathers on the nape. It forages by nimbly moving up and down tree trunks and branches, feeding mainly on insects and spiders. Depending on the season, it also consumes fruit and tree sap. During the breeding season, from spring to early summer, it excavates its own nest cavity—typically 3–5 cm in diameter—where it lays eggs and raises its young. In many cases, a new cavity is dug each year. Its vocalizations are distinctive, producing sharp calls such as “gii” and “jijiji,” and it also engages in drumming on tree trunks to proclaim territory. Adaptable to a wide range of environments, the Pygmy Woodpecker is commonly observed even in suburban areas.