Data from: A revision to the distribution of plumage polymorphism in the Red-tailed Hawk (Buteo jamaicensis)

Our study describes spring migratory movements and home ranges during the nesting period for four dark morphs captured in the Great Lakes region of North America contextualized against movements during the nesting period for 22 light morph individuals belonging to the subspecies B. j. abieticola. Our results indicate that these dark types nested in eastern Canada and belong to the same geographic breeding population as the light individuals, extending the distribution of plumage polymorphism in the species approximately 1500 km into eastern Canada.