Animation showing spread of European Goldfinches in midwest USA.
See the paper: https://neobiota.pensoft.net/article/97736/
Craves JA, and 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