Chiffchaffs moving south

The Chiffchaff (Phylloscopus collybita) is one of several passerine species that increase in Sweden and are pushing up their distribution range from the south, colonizing new habitats and areas in the country. In our (central) parts of Sweden however, the Chiffchaff is not yet a regular breeding bird (yet) and in fact not a bird I see many times a year at all. We are namely mostly exposed to the northern population on migration. Mid september is when they turn up on their way south and during a relatively short period of a few weeks they can be enjoyed, often spotted by their distinctive song. At this time practically all Willow Warblers have gone south.  Today I saw my first Chiffchaff for the autumn. It flitted around in one of my big apple trees in the garden and I was surprised to get a few images of this constantly moving little bird. I later saw a Bluethroat as well but the Chiffchaff was the bird of the day for me.