The peculiar behaviour is believed to be the first evidence of an animal using its stomach to communicate.
The intimate lives of flying foxes are wild and boundless compared to other animals.
For a long time it was not believed that animals were even capable of feeling pain, let alone complex emotions. We now know that is far from the truth.
The Animal Behaviour category asked for photographs of animals engaging in natural activities. These photos will be exhibited at the South Australian Museum in Adelaide (18 August to 3 October) and the Australian Museum in Sydney (19 August to 9 October).
Australia is renowned for its venomous snakes, scary spiders and even painful plants – but the animals that pose the biggest risk to our lives might surprise you.