Fitzgerald, A.M., Weir, J., Ralston, J., Warkentin, I.G., Whitaker, D.M., Kirchman, J.J., 2019. Genetic structure and biogeographic history of the Bicknell?s Thrush/ Gray-cheeked Thrush species complex. The Auk 137. doi:10.1093/auk/ukz066