We went in search of the green hairstreak butterfly today. We did not see a single butterfly of any sort, but there were lots of little brown jobs; this bird flew quite close to us for several minutes. It could be a willow warbler, a chiffchaff or a wood warbler. It had a sweet song which suggests it was a willow warbler freshly arrived from overseas, but it is notoriously difficult to tell one lbj from another. Unusually, the jay shown below flew towards us rather than away and displayed its very handsome blue chevrons.
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