Just like we knock on melons to find the best ones, birds know to shake nuts to find out their quality. This is according to a study of Mexican Jays which found they knew the difference between ...

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DEAR JOAN: Is it OK to put crumbled walnuts and pecans in with the birdseed? I buy organic tree nuts in bulk and crack my own. One or two nuts out of 100 have worm frass and webbing, but most of the ...

Mexican Jays (Aphelocoma wollweberi) distinguish between heavier and lighter peanuts by shaking the nuts in their beaks, which allows them to 'feel' nut heaviness, the findings showed. "When we ...