Swainson's Thrush (Catharus ustulatus), a Special Concern species, is medium-sized thrush that breeds in dense understories of older wet forests, including spruce-fir, hemlock-hardwood, and sugar maple stands with dense sapling layers. Nests are constructed from various plant materials such as grasses, stems, mosses, and rootlets. The species is sensitive to human disturbances near their breeding sites. The recommended avoidance period is May 20 - August 10.
