The Indian flying fox is a massive, fruit-loving bat with a complex social life.

Nature · Published 3 October 2026 Swipe more like this →

In short: Weighing up to 1.6 kilograms with a wingspan reaching nearly five feet, the Indian flying fox is among the world's largest bats. While often dismissed as agricultural vermin, these nocturnal creatures are essential pollinators and seed dispersers, supporting hundreds of plant species across the Indian subcontinent through their unique foraging habits.

The Indian flying fox, or Pteropus medius, is a highly social mammal that roosts in large, established colonies often numbering in the thousands. These camps are typically situated in tall trees near water or human settlements, where the bats remain year-round. Their daily rhythm is dictated by light and temperature; they are largely silent during cloudy periods but become vocal and active during sunny hours, eventually emerging to forage shortly after sunset.

Their diet is primarily frugivorous and nectarivorous, consisting of fruits like mangoes, figs, and guavas, alongside flowers and occasionally insects. By consuming these fruits, they play a critical role in ecosystems; seeds passing through their digestive tracts are scarified and dispersed, aiding the propagation of nearly 300 plant species. Despite this ecological value, they are frequently viewed as pests due to their impact on fruit farms, and their habitats are under constant pressure from urban expansion and road development.

The species exhibits complex reproductive behaviors, including a polygynandrous mating system. Males engage in persistent courtship, and researchers have documented unusual behaviors such as oral sex, which is thought to increase female receptivity. Furthermore, these bats are of significant interest to science as natural reservoirs for various viruses, including henipaviruses and flaviviruses, which can be fatal to humans and domestic animals. Understanding their biology is therefore not only a matter of ecological conservation but also of public health.

Taxonomically, the species has been the subject of debate. While some authorities still use the name Pteropus giganteus, others have adopted Pteropus medius following a 2012 argument based on the Principle of Priority. Regardless of the naming dispute, the bat remains a keystone species, with its guano and seed dispersal patterns supporting the growth of vital trees like the banyan across its range from Pakistan to Bangladesh.

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