Update: This paper has been published! It's open access so you can read online or download the PDF; click on title below -
Craves, J.A., and N.M. Anich. 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. doi: 10.3897/neobiota.81.97736
On the heels of my recent posting on a report of a family of European Goldfinches in Waukegan, Illinois comes another report with photo documentation of a juvenile "EUGO". This one is from a the Racine, Wisconsin suburb of Mt. Pleasant, about 25 miles north of Waukegan.
An adult was first seen at the observer's feeder in June, although neighbors had seen multiple EUGOs at their feeder (and I have many reports from the Racine area). On 9 and 22 July, a young bird showed up, at times with an adult, and these were among the photos obtained:
Left, adult European Goldfinch. On the right, the juvenile European Goldfinch on the left side of the sock, and an American Goldfinch on the right side.