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'Siberian' #chiffchaff ( #Phylloscopus collybita tristis) highlight of today's 88 #birds ringed at Landsort BO. It was *really* small (wing 55.5 mm) and round-winged (P2=P9). Not ashamed to have triple-checked for plain leaf #warbler (Ph neglectus)—caught 35 years ago here! 📸 @johrosen.bsky.social 🦅

So tiny!