1. Ice Swimmer says

    As a kid I likened great tits plumage to a yellow vest with a black zipper. I still do.

    Finnish great tits have started to sing shorter and shorter patterns, the “classical” rural version had three syllables, then urban birds started to sing just two (possibly because of background noise, this was noticed in the 1980s, I think) and later one. The shorter version has also spread to the countryside.

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