Geographical distribution of Swainson's thrush.   Breeding  Migration  Nonbreeding
Mack, D. E. and W. Yong (2000). Swainson's Thrush (Catharus ustulatus), version 2.0. In The Birds of North America (A. F. Poole and F. B. Gill, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi-org.acces.bibl.ulaval.ca/10.2173/bna.540
BirdLife International. 2016. Catharus swainsoni. The IUCN Red List of Threatened Species 2016: e.T103881981A104197385. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T103881981A104197385.en. Downloaded on 14 May 2018.
Cephas