In observance of Bat Week, October 24–31, the New York State Department of Environmental Conservation (DEC) is encouraging outdoor enthusiasts to avoid visiting caves and mines during fall and winter to protect endangered and threatened bat populations.
“Disturbing bats during hibernation can cause unnecessary harm to their survival and recovery,” said DEC Commissioner Amanda Lefton. “Please avoid caves and move quietly if you encounter bats so they can remain in their natural hibernation patterns.”
Bats play a critical role in controlling insect populations in New York, helping to reduce the need for pesticides, limit mosquitoes, and curb invasive insects. Of the nine bat species in the state, six hibernate in caves and mines, while three tree-dwelling species migrate to warmer areas. During the fall, bats consume up to their body weight in insects nightly to build fat reserves for hibernation or migration and to mate during the “fall swarm.”
Human disturbance at hibernation sites, or hibernacula, can raise bats’ body temperature, depleting fat reserves essential for surviving winter. This risk is especially significant due to white-nose syndrome (WNS), a fungal disease that has killed more than 90% of bats at hibernation sites since 2007. While the little brown bat shows some signs of recovery, other species remain critically affected.
DEC reminds visitors to follow posted restrictions on caves and mines. Entering a hibernation site between October 1 and April 30 can lead to prosecution. If bats are encountered, leave quickly and quietly.
Other ways to help bats include:
- Limiting tree removal to the winter months to protect maternity roosts.
- Planting pollinator gardens to provide food for bats.
- Installing bat boxes to create safe summer roosts.
- Contacting bat-certified Nuisance Wildlife Control Operators for safe removal from homes.
For more information on protecting bats in New York, including bat box designs and a list of certified NWCOs, visit the DEC website.
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