pics © Marijn van Oss & Jorrit Vlot sound © Thijs Fijen Earlier I wrote 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 peep. No, it called like a Common Chiffchaff! Now the following bird, observed on Vlieland on 25 October by Thijs Fijen and his mates Marijn van Oss and Jorrit Vlot, could very well be a

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-alikes on 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. More significant is that it called dozens of times, just before I released it. And it called