Are eastern and western monarch butterflies distinct populations? A review of evidence for ecological, phenotypic, and genetic differentiation and implications for conservation

Freedman, M., J. De Roode, M. Forister, M. R. Kronforst, A. Pierce, C. Schultz, O. Taylor and E. Crone. 2020. Are eastern and western monarch butterflies distinct populations? A review of evidence for ecological, phenotypic, and genetic differentiation and implications for conservation. Preprints: 2020090353.