I went to Whatbird.com, looked in "yellow" category, the only bird that even comes close is a Yellow Warbler but those appear to have some brown on the breast. Except for the prolonged beak, this looks like a canary to me! It's not uncommon for birds to escape (or, sadly, be thrown out of windows) during the spring/summer when windows are first opened. The very long beak is what I find odd, I doubt a canary could survive long enough in the "wild" for its beak to grow out that way, but then what do I know, I'm a newby on this site, just learning myself.
It would be nice to see if this bird has wingbars. The beak is not warbler beak. this may be a juvenile oriole or an adult female Orchard Oriole. The bird does not look warbler to me at all, more like a oriole of some type (Hooded or Orchard). Where was this photo taken?
Matt Reid