Chiffchaff trouble

Tell me why this bird isn’t a Common Chiffchaff.
It was photographed at Fishers Green, Lee Valley, England last Sunday afternoon.
Any thoughts?
Chiffchaff (Russell Spencer)
Chiffchaff – back end (Russell Spencer)
2 replies
  1. Anonymous
    Anonymous says:

    Chiffchaff photographs are notoriously tricky to interpret. Sometimes just a few additional lines of a traditional description can be useful, however, that seems to be going out of the window these days.

    It looks to have olive tones and to be a collybita, but what did it look like in the field?

    Reply

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