Each night, flying foxes leave their roosts in big trees and fly out to find ripe fruit, flowers and nectar. They have large eyes and a good sense of smell - much more than the echolocation that smaller insect-eating bats use. Following the smell of fruit, a flying fox can travel up to 50 kilometres in a single night.
They are brilliant gardeners without meaning to be. A flying fox bites into a fruit, swallows the juice and soft flesh, and then the seeds pass through its body and drop to the ground somewhere else - sometimes many kilometres away. In this way, they spread the seeds of rainforest trees all across the island. Without them, some forests would not grow back after storms.
During the day, flying foxes sleep by hanging upside down from tree branches. Their feet are specially shaped for this - it takes no effort for them to hang; their weight actually locks the grip tight. When a whole colony of them hangs from a large tree, it can sound like they are chattering to each other.
The Fijian word for flying fox is 'beka'. In many Fijian villages, certain families have traditional custodianship over flying fox colonies - a responsibility to watch over the bats and make sure they thrive. These traditions are thousands of years old.