Sibe chiff still present? And still no obvious vocal contribution from this tristis candidate.
Added to flikr album: https://www.flickr.com/photos/139729595@N08/albums/72157663987567145/with/24331317970/
Both photographed in the same tree these show a comparison - and allowing for light and 'morphing' - the top tristis type collybita looks quite, if subtly, different. Both photos have been cropped only.
Caching
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