@brittarnhild
He, or is it a she, is a migrant bird, and every year when autumn comes he/she spend some time in our garden.
Because he is so small, much smaller than the other songbirds, it is actually quite easy to spot it.
And since my camera is always ready and Terje had washed the windows the day before.......well, I got some great photos, didn't I? :-)
A common chiffchaff, or gransanger as we say in Norwegian.