Mystery Bird: American Goldfinch, Carduelis tristis

Escaped canary!

I spent awhile trying to figure out what this might be the juvenile form of, because I couldn't think of any tiny yellow finch-billed birds with no significant markings. But does this bird actually lack markings, or are they just carefully out of sight?

I'm going to call this an American Goldfinch (Carduelis tristis), winter plumage ... and carefully perched to prevent us from seeing its wings! None of the other yellow finches are plausible. This bird is too yellow to be a pine siskin, not yellow enough to be Lawrence's Golfdinch, and lacks the cap of the Lesser Goldfinch.

I'm going with Lesser Goldfinch dressed for winter. I'm saying Lesser Goldfinch due to the color of the bill and the white patch on the abdomen. This bird looks a great deal like the Lesser Goldfinches that are visiting my thistle feeder here in Reno.