chiffchaff

tiltaltti

uunilintu

tilt-talt A small, common warbler, (taxlink), with yellowish-green plumage that breeds throughout northern and temperate Europe and Asia.
Any of several other species of the same genus.
puhekieltä the birdsong song of the chiffchaffNoun chiffchaff.

I thought I heard something singing chiffchaff, chiffchaff. So I had a look and there was a chiffchaff.