This ingenious pocket device allows you to chat to birds in your garden or when you’re out walking. Simply twist the zinc plug against the wooden cylinder.

Originally used by hunters in Europe, the whistle does not produce sounds specific to any particular species of songbird, but rather a generic birdsong that most birds will recognize

If you have difficulty identifying the birds, why not download common birdsong onto your mp3 player? You’ll be an expert bird caller in no time.