An Iberian chiffchaff is present since 2 week in Stockholm (Sweden).
Two days ago, I managed to record its song :
I have no previous experience of this species, but, for me, this song seem different compare to the others I could find on internet (although it share a similar structure).
I would like heard your opinion on this bird.
PS: plumage wise, the bird is indistinguishable from common chiffchaff