The Goldfinches in my garden have been increasing in numbers recently and my small feeder trap has been bustling and chirrupping with activity every morning.Today was a successful day with 31 birds ringed in just an hour and perhaps most interestingly I caught a bird with colour rings. I was initially excited that I'd controlled a bird that had been ringed as part of a colour-ringing project, but there was no metal BTO ring to be found! After a phone call to Pete, it became clear to me that the bird was likely to have been an escaped cage bird. Seeing as the rings were not closed rings (used by breeders on small chicks) it also seems possible that this bird has been trapped, perhaps illegally, as a full grown bird before it made its get-away!
I could find nothing out of the ordinary in terms of strange moult and the bird seemed to be 'normal'. After taking these photographs I released it without ringing it. I'd be keen to know if anyone else has come across birds like this though?