A small, common warbler, Phylloscopus collybita, with yellowish-green plumage that breeds throughout northern and temperate Europe and Asia. / Any of several other species of the same genus.

plural of chiffchaff

Phylloscopus ibericus, a species of leaf warbler endemic to Portugal, Spain and North Africa, west of a line stretching roughly from the western Pyrenees via the mountains of central Spain to the Atlantic.