Contopus sordidulus are found in western North America, starting in east central Alaska, to northwestern Minnesota, all the way south into southern Baja. In the fall they leave the northern area and head towards the south. During the winter, they can be found migrating even further south to Panama.
Biogeographic Regions: nearctic ; neotropical Rights Holder
: The Regents of the University of Michigan and its licensorsBibliographic Citation
: Gasparella, L. 2004. "Contopus sordidulus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at Citation Link