European Greenfinch

The European greenfinch is 15 centimetres long with a wingspan of 24.5–27.5 centimetres, similar in size and shape to a house sparrow but mainly green, with yellow in the wings and tail. The female and young birds are duller with brown tones on the back. The bill is thick and conical. The song contains a lot of trilling and twittering interspersed with wheezes, and the male performs a butterfly display flight. Ten subspecies are recognised. (Wikipedia, general species account)

This songbird is widespread throughout Europe, North Africa and Southwest Asia. It is mainly resident, though some populations from the far north migrate further south. It has also been introduced into Australia, New Zealand, Uruguay and Argentina. Male greenfinches show higher degrees of fluctuating asymmetry, as their bones are more susceptible to disruption during development than those of females. (Wikipedia, general species account)