Thrushes are plump, soft-plumaged, small to medium-sized birds that inhabit wooded areas and often feed on the ground. The largest thrush is the
great thrush at and ; the larger, commonly recognized
blue whistling thrush is an
Old World flycatcher. The
Amami thrush might, however, grow larger than the
great thrush. Most species are grey or brown in colour, often with speckled underparts. Thrushes are
insectivores, but most species also eat worms,
land snails, and fruit (usually
berries). Many species are permanently resident in warm climates, while others migrate to higher latitudes during the summer, often over considerable distances. Thrushes build cup-shaped
nests, sometimes lining them with mud. They lay two to five speckled eggs, sometimes laying two or more
clutches per year. Both parents help raise the young. In almost all cases, the nest is placed on a branch; the only exceptions are the three species of
bluebird, which nest in holes. ==Ecology==