A quiet moment of survival — the sharp-eyed Eurasian Sparrowhawk bends low to sip from the riverbank. See how birds of prey hydrate in the wild, where every move must be alert and swift.

One theory is that the flutes were used attract the birds of prey - namely the Eurasian Sparrowhawk and the Common Kestrel - to frighten waterfowl, making them easier to catch.