Bats and White Nose Syndrome (WNS)
Downloadable files below are in the PDF format.
White-Nose Syndrome, a fungus that has decimated some bat species in the Northeast, was confirmed in South Carolina in March 2013.
Since White-Nose Syndrome (WNS) was first reported there in 2006, colonial cave bats have drastically declined in the Northeast, according to Mary Bunch, a wildlife biologist with the S.C. Department of Natural Resources in Clemson. A newly described cold-loving fungus, Pseudogymnoascus destructans, has been linked to WNS. The fungus grows on the muzzle and wings and is most easily detected on afflicted bats in the winter and late spring. Many afflicted bats prematurely arouse from hibernation, and they appear dehydrated and emaciated prior to death.
Wildlife professionals need to be prepared for bat die-offs and groups of bats displaying unusual behaviors. Typically, testing for WNS is only done in the cooler months of October through April, when the fungus is most easily detected. South Carolina Department of Natural Resources staff will submit appropriate bat samples to the Southeastern Cooperative Wildlife Disease Study at the University of Georgia for diagnosis. While there currently is no proven cure or prevention of WNS, it is important to properly diagnose it and to monitor WNS-positive colonies. While more than 90 percent mortality has been reported in Northeastern bat populations, South Carolina's warmer, shorter winters may favor improved bat survivorship.
White-Nose Syndrome is not a direct threat to humans, Bunch said. No other mammals seem to be affected. WNS can be spread from bat to bat and from the cave environment. Equipment and clothing can also carry White-Nose Syndrome from site to site.
In winter and early spring, if dead and dying bats are found with white fuzzy material on muzzle or wings or in groups of six or more bats, contact your regional wildlife office promptly. Keep children and pets away from any dead or dying bats and place a bucket or can over any fresh carcass. If bats are not fresh (odorous or have ants) they cannot be tested and should be disposed up by scooping them up with a shovel and placing in a plastic bag, tie off the bag and place bat(s) in the trash. Bats flying in daytime during hot weather are not too uncommon and that behavior is probably not linked to WNS. WNS testing is not done in the warm months.
Not all colonial bats species are affected by WNS. The non-hibernating free-tailed and evening bats may not be impacted at all. Likewise WNS has not been seen in tree bats.
Wildlife professionals that plan to submit bats for testing should store the bat on ice or freezer pack or refrigerate. Bat should be double bagged in sealable plastic bags (Ziploc) prior to storage, labeled with date, specific location and contact information and placed on ice (not frozen). If one to three dead bats are found at any time of year outside, then dispose of carcass. No submissions are accepted on Friday through Sunday (the testing lab isn't staffed over the weekend). Never handle a dead or live bat with bare hands. Dead bats are best picked up when wearing disposable latex or nitrile gloves, then double bag the bat in plastic bag.
Additional Information on White-nose Syndrome
- Protocol for Wildlife Rehabilitator Response to Hibernating Bats Affected with White-nose Syndrome
- The Responsible Caver and White-nose Syndrome Decontamination
- White Nose Syndrome
(decontamination information, fact sheets, updated maps of WNS spread, teaching guides, wildlife control acceptable practices, caver information, etc)
- Bat Conservation International
- Acceptable Management Practices for Bat Control Activities in Structures - A Guide for Nuisance Wildlife Control Operators
- National white-nose syndrome decontamination protocol April 2016 (US Fish and Wildlife Service)