Lesser Goldfinch

I’ve spent a good deal of time in Arizona the past twenty years, but failed to photograph several common Sonoran Desert birds. This winter, I went in search of the local aves. I still haven’t photographed a Phainopepla. I did finally photograph a Lesser Goldfinch.

Lesser Goldfinch 2
Lesser Goldfinch
Lesser Goldfinch 1
Lesser Goldfinch

After some research, I failed to discover why this bird is called the “Lesser” Goldfinch. So, I’ll speculate. I’m thinking the name comes from comparisons of the Lesser Goldfinch to the American Goldfinch. The American is more widespread. The male American Goldfinch, in full breeding plumage, is also more striking than the Lesser Goldfinch. If anyone knows the definitive answer, please summarize it in the comments.