Earlier Iwrote about Siberian Chiffchaffs with common Chiffchaff calls (here). That bird (mostly) looked like a Siberian Chiffchaff, and after analyses it indeed showed Siberian mtDNA - but in the field didn't utter the characteristic
No, it called like a Common Chiffchaff!
Now the following bird, observed on Vlieland on 25 October by Th...
Right. Chiffchaffs never stop to amaze me. But I now feel we're really getting somewhere.
Only very recently Peter de Knijff and I wrote something about Siberian Chiffchaff look-alikeson this site. The upper bird in that little web article looked like a tristis, but IMHO it was not an exact copy. Something looked off. So I ringed it as a Common Chiffchaff, without specifying the ssp.
Spring 2016 was mind-blowing: good migration, loads of rarities and a few nice influxes due to seemingly never ending easterlies. But this year's spring was ratherodd. In general it was kinda bleak. But I had a fantastic spring myself when it comes down to finding rare birds.
A Blue Rock Thrush on the island of Vlieland was an exciting twitch (2nd Dutch record, new bird for my Dutch...