Cirl bunting Bird is a colourful bunting, although rather subtle and can easily blend into its surroundings. The male has a black throat extending back to the neck sides, a black bridle through the eye and primrose-yellow underparts, supercilium and long cheek-stripe. It has a grey-green breast band that extends into a narrow collar, rusty-brown patches at the breast sides and dark streaks on the flanks. The upperparts are brown with black streaks, and the rump is olive-grey in all plumages. The female is more demure and streaky, with fairly bold pale yellow and dark striped sides to the head, and yellow-tinged underparts that are streaked from breast to flanks.
Cirl bunting Bird is essentially a bird of the Mediterranean, it is found across France and has a localized population restricted to south-west Britain, to where it has retreated in recent decades from elsewhere in England and Wales. It favours sunny slopes and rolling country, avoiding open plains and preferring woodland edge, thickets and bushy areas, orchards, vineyards and large gardens. In Britain it is found in farmland with small fields and lots of bushy hedgerows with some tall trees.
The main call type is very thin and high, slightly downward-inflected "tsii" or "seep", and Cirl bunting Bird also has a more sparrow-like and chirpy "tsuu" or "cheuu". The song is a rather long rattle of notes, not dissimilar to the song rattle of the Lesser Whitethroat, slightly ascending in pitch and increasing in volume over the course of the sequence, such as "chi'di'di'di'di'di'di'di'di'di'di". It typically lasts about 1.5 seconds, at a rate of 11 notes per second, but some individuals may sing at a much faster rate or give a shorter, harder and more half-hearted version, which may often be sung alternately with the typical sequence.