Miniopterus bats roosting

Bats: Essential for Forests and Fruits

All over the world, bats play a highly important, yet highly underappreciated role in maintaining the health and sustainability of native forests and agricultural systems. AlTo’s field and Awareness programs on behalf of bats seek to conserve native flying foxes (fruit bats) and insectivorous bats in the places where they live, while also helping Tompotikans to understand the priceless services bats provide to humans and other biota–all for free!

Protecting Bats Where They Live

The Tompotika region is an important center for bat diversity. The island of Sulawesi, of which Tompotika is a part, itself harbors over 70 species of bats, many of them found nowhere else in the world. But beyond that, Tompotika is also rich with karst cave formations, which provide habitat for cave-roosting bat colonies.

AlTo’s field program for bats focuses on protecting the places where bats roost during the day–primarily, caves and offshore islands–from excessive hunting and disturbance. Tompotika’s flying foxes, for instance, are gravely imperiled: although few people eat them locally, commercial hunters have been capturing them by the tens of thousands for transport to bushmeat markets in Northern Sulawesi. With mother bats producing only one offspring per year, bat populations simply cannot withstand the tremendous hunting pressure they’ve been subjected to.

No Bats, No Durian!

Sulawesi Flying Foxes, Acerodon celebensis

Sulawesi Flying Foxes roost by day on an uninhabited island (© Robin Moore/AlTo)

AlTo’s Awareness program is aimed at building long-lasting public support for bat conservation through interactive programs in schools and villages. Most people don’t know, for instance, that the trees of many favorite tropical fruits and nuts, such as mangoes, cashews, wild bananas, avocadoes, and many more, rely on bats for pollination to produce fruit. In fact, the durian tree, source of one of Southeast Asia’s most prized delicacies, can produce fruit only if pollinated by bats.

No bats, no durian! Fruit bats also play a critical role in maintaining the health of Tompotika’s native tropical forests by pollinating trees, spreading seeds to help forests regrow, and by providing high-quality fertilizer. In addition, insectivorous bats keep populations of insect pests, such as the mosquitos that spread malaria or the grasshoppers that destroy rice crops, under control.

With its partners, AlTo has developed various outreach materials in Indonesian that are helping to spread the word about the importance–and the wonders!–of bats.

What You Can Do

You can help support AlTo’s bat conservation efforts.


Please click here to donate to AlTo to help keep bat caves and roost sites safe and build public support for bat conservation.

Be Aware

Be respectful when visiting bats’ homes

Please remember, if visiting caves or other roost sites, move quietly and avoid disturbing the bats, and do not bring food or anything else into or out of caves! If you have previously visited any caves in North America or other locations that might harbor White-Nose Syndrome (WNS), do not bring any clothing or equipment–shoes, cameras, flashlights, backpacks, etc.–that have entered such caves to Indonesia at all! WNS is a highly contagious disease devastating to bats.

Don’t purchase or consume bat meat

In addition, please don’t purchase or eat bat meat from markets in Sulawesi–the bats were likely taken from populations that are currently in steep decline due to unsustainable harvest. Furthermore, consumption of bat meat has been linked to human diseases, such as Nipa virus and neurological diseases, so it’s safest to avoid eating bats altogether!


Caves like this one provide critical bat roosting habitat in Tompotika. For scale, see the man with a backpack

Caves like this one provide critical bat roosting habitat in Tompotika. For scale, see the man wearing a backpack. (© Robin Moore/AlTo)