The pictures are of a bright yellow bird feeding at Niger tube feeders. Several winter plumage American Goldfinches are also on the feeders; the mystery bird appeared only slightly longer although much more plump. The head, back, and upper wings appear to be a yellowish gray while the undersides and eyebrow line are an intense yellow. In certain images (3, 10, 11), the ends of the primaries appear to show some white and black; the tail is similarly colored and slightly notched.
The bird is presumed to be an escaped cage bird and a member of the genus Serinus.
There is also a 30 second long AVI file 320x240 (3,925 kb), primarily a side view. This file is MPEG4 encoded and would require an up-to-date media player.