Breeding in taiga and adjacent tundra from Newfoundland to eastern Siberia, the Gray-cheeked Thrush may be North America’s least-known Catharus thrush. Few ornithologists visit its remote breeding habitats, and fewer still have studied its natural history and ecology. During the breeding season, the Gray-cheeked Thrush primarily a bird of brushy willow-alder thickets and low spruce forests with dense undergrowth. A relatively shy species, especially during migration, the Gray-cheeked Thrush is less retiring on breeding territories and during subarctic twilight activity periods. Birders are more likely to hear this species’ nocturnal flight call during spring and fall migration than to observe migrants on the ground. The species winters in South America east of Andes: Colombia, Venezuela, Trinidad, Guyana and nw. Brazil (upper Rio Negro) -- the limits of its distribution in South America is poorly known.