|Side profiles of the heads of the 14 Goldfinches caught this morning, one of the standard photographs|
that I take of each bird. A few still had remnants of juvenile feathers.
|Another male type with extensive red mask and all other features were indicative of it being a male. This bird also had a very deep bill and convex culmen compared to all the others caught today.|
Hopefully my study will help throw some light on the sexing of Goldfinches using plumage features but I suspect that it will mainly find that a significant proportion of birds are safer left unsexed or are only given a provisional sex..