The population of an endangered Australian bat suddenly dropped by up to 16%. No one knows why
Summary
Experts recorded about 5,000 fewer southern bent-wing bats at a key cave in Australia last summer, marking a 14-16% decline in their population. The cause of this drop is unknown, and it worries researchers because the bats are critically endangered and important for controlling insects.Key Facts
- Southern bent-wing bats are critically endangered and live mainly in caves in south-west Victoria and south-east South Australia.
- The Naracoorte cave is a major maternity site where many bats gather to have their young each summer.
- The bat population at Naracoorte has dropped from an average of around 28,600 adults to about 14-16% fewer bats last summer.
- These bats live up to 22 years, but reproduce slowly with only one baby each year.
- Possible reasons for the decline include habitat loss, drought, fewer insects to eat, human disturbance, wind turbine collisions, and disease risks.
- Conservation efforts include restoring habitats and planting native plants to increase food supply for the bats.
- Southern bent-wing bats have lived in this region for approximately 500,000 years.
- Researchers emphasize the bats’ role in controlling agricultural pests and disease-carrying insects.
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