Saw this bird this morn. It's the brightest yellow bird I've ever seen outside of a pet store. Moved quickly, and was accompanied by a duller-coloured companion. Garland, TX (north of Dallas) 17-05-2012.
CLOSED: Yellow Warbler?
Resin Northumberland, United Kingdom(Zone 9a) May 18, 2012
Yep, Yellow Warbler, male; the duller one will have been a female.