About Turdus naumanni Temminck, 1820
Naumann's thrush (Turdus naumanni Temminck, 1820) is a member of the thrush family Turdidae. It breeds in open woodland areas, ranging from central Siberia eastward to North Manchuria, Amurland, and Sakhalin. It is closely related to the dusky thrush (T. eunomus), which breeds further north; the two species have often been considered conspecific. Compared to Naumann's thrush, the dusky thrush is more tolerant of mountainous and tundra-edge habitats. Naumann's thrush is strongly migratory, and winters across South Asia to Southeast Asia, principally in China, Korea, and neighboring countries. It is a rare vagrant to western Europe. The species builds untidy but neatly lined nests in trees, where it lays between 3 and 5 eggs. Migrating and wintering individuals often gather in small flocks. Naumann's thrush is omnivorous, and feeds on a wide range of insects, especially mosquitoes, earthworms, and berries. This is a medium-sized but stocky thrush, similar in structure to a small fieldfare. Its underwing is reddish brown, and it has a pale supercilium. Naumann's thrush has a pale brown back and head. Its face, breast, flank spots, and rump are reddish, while its belly and undertail are white. In contrast, the dusky thrush has a darker brown back and rump, and its face, breast, flank spots, and rump are black, with a white belly and undertail. Female Naumann's thrush are fairly similar in appearance to males, while immature individuals have weaker patterning. The song of Naumann's thrush may differ from the simple fluted or whistling redwing-like song of the dusky thrush. The genus name Turdus comes from the Latin word for 'thrush', and both the species name and common English name commemorate German naturalist Johann Andreas Naumann.
