Identification
Goldfinches are smaller than a house sparrow, with a bright yellow wingbar visible both in flight and when perched. Wings and tail otherwise black (some white spots near tail tip), contrasting with the buff-brown back. Adults have diagnostic bright red, white and black facial feathering. The red is more extensive in the males, especially above and behind the eye. Juveniles have drab brown on the head. Often in flocks (small or large), goldfinches have a bouncy undulating flight.
Voice: a liquid, tinkly calling, often given by flocks in flight. Also a shrill, clear pee-yu.
Similar species: The slightly larger greenfinch also has yellow at the base of the primaries, forming a diffuse patch on the outer wing. All finches have similar undulating flight, but can be distinguished by their calls.
