Phnom Penh’s urban landscape has long been home to a fascinating yet elusive species: the flying fox, whose “sanctuary tree” in the capital is even marked on Google Maps. These large fruit bats, known ...

The skies above Lake Burley Griffin are pretty vast. But potentially not vast enough to leave enough space for flying foxes and drones to travel across it at the same time.

That's because, unlike other species of bats, they don't use echolocation or sonar to navigate, but their hearing and eyesight. Flying foxes can have a wingspan of up to a metre and weigh ...