Horornis diphone canturians (Swinhoe, 1860)

Scientific Nomenclature

The Japanese bush warbler (scientific name: Horornis diphone canturians (Swinhoe, 1860)) has an olive brown upper body, and darker dusky coloring on its underparts.

Plumage and Facial Features

It has pale eyebrows, and an upward-curving beak that gives it the appearance of smiling.

Body Length

This species typically reaches 15.5 centimetres (6.1 inches) in total length.

Year-Round Range

It is a common year-round resident across most of Japan excluding Hokkaidō, as well as the northern Philippines.

Summer Breeding Range

During the summer, it can also be found in Hokkaidō, Manchuria, Korea, and central China.

Winter Non-Breeding Range

During the winter, it can additionally be found in southern China and Taiwan.

Introduced Range

It was introduced to Oahu between 1929 and 1941, and has since spread across all the main Hawaiian Islands.

Summer Habitat

In summer, it ranges from low hills up to high mountains, where it prefers to live in bamboo thickets and among black pine trees.

Winter Habitat

In winter, it seeks out covered habitat at lower elevations.