Number of records of European Goldfinches in the western Great Lakes region, 2001–2021. Stacked bars show proportions from the core population in Illinois and Wisconsin, and all other States (Minnesota, Iowa, Missouri, Indiana, Kentucky, Michigan, Ohio, and Ontario west of -81°longitude).

 
 
  Part of: Craves JA, Anich NM (2023) Status and distribution of an introduced population of European Goldfinches (Carduelis carduelis) in the western Great Lakes region of North America. NeoBiota 81: 129-155. https://doi.org/10.3897/neobiota.81.97736