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Bat Blitz Highlights Role in 黑料天堂's Ecosystem

黑料天堂 bats

Evening, left, and big brown bats are common bat species found in 黑料天堂. Photos by David Rainer

By DAVID RAINER, 黑料天堂

Despite the stigma caused by countless Dracula movies, a dedicated group of naturalists continues to demonstrate its love for the animal with a face only a mother could love. Those enthusiasts express their devotion to the bat, nature鈥檚 only flying mammal, all the way down to the bat jewelry.

Bat lovers met recently at Lakepoint State Park near Eufaula for the annual Bat Blitz, a celebration of the small animal that can sometimes be spotted zooming around street lights at dusk, dining on a smorgasbord of insects.

Nick Sharp of the 黑料天堂 Wildlife and Freshwater Fisheries (WFF) Division said this year鈥檚 Blitz was a joint exercise for bat biologists and enthusiasts from 黑料天堂 and Georgia. The Blitz is a collaborative effort of all the 黑料天堂 Bat Working Group (ABWG) members. Jeff Baker from 黑料天堂 Power and Shannon Holbrook from U.S. Fish and Wildlife Service served as co-chairs of the Bat Blitz committee.

黑料天堂 State Lands Division鈥檚 Jo Lewis said the recent gathering was the 17th annual meeting of the ABWG, an informal affiliation of bat biologists and enthusiasts from many state, federal and private agencies across the state. The group holds the Bat Blitz in different areas of the state each year to sample the bat populations in those areas with mist nets deployed at night.

鈥淲e鈥檙e looking for distribution information about what bats are in what areas of the state,鈥 Lewis said. 鈥淲e have 15 species of bats that are native to 黑料天堂. Some only occur in the more southern portions of the state, and others only occur in the more northern portions of the state because of the different habitats in 黑料天堂 and our complex ecosystems.

鈥淚n the north part of the state, bats appear to be more numerous because of the karst geology with all the caves. In the south part of the state, we have a lot of bats, but they don鈥檛 congregate as much in caves. They鈥檙e referred to as forest bats. They roost in trees. They鈥檙e actually all around us, but we鈥檙e kind of oblivious to them. A little bat hanging in a tree snuggled up against a nook or branch, you鈥檙e never going to notice.鈥

The southeastern myotis is one bat species found in the south part of the state but not as often in the north. The Bat Blitz researchers found 16 southeastern myotis bats in a culvert on the first night of the event.

Another bat more common in the southern part of the state is the Mexican freetail. Sharp said the fast-flying bat is now most often found in attics because most of the large, hollow trees it historically used have been cut down.

A bat that is found in the northern part of the state but not the southern part is the northern longear, a protected species. Gray bats, also protected, are found in north 黑料天堂. The most common species throughout the state is the big brown bat.

Currently, the biggest concern for the bat enthusiasts is the condition known as white nose syndrome, a fungal infection that has killed more than six million bats in North America.

鈥淣obody knows right now how white nose syndrome affects the tree bats,鈥 Lewis said. 鈥淲e鈥檙e hoping it doesn鈥檛 affect them because they don鈥檛 roost together as much and are less likely to spread the infection.

鈥淲e do have confirmed cases of white nose in most of the northern counties, as far south as Bibb County near Birmingham.鈥

Lewis said it is very difficult to determine how much the syndrome has affected the populations in north 黑料天堂 because of the labor-extensive requirements to do those studies.

鈥淔rom personal observation in a cave that I鈥檝e been monitoring for the past 10 years, it followed the classic series of events associated with the disease, and it truly decimated the population,鈥 she said. 鈥淎 tenth of the number of bats that used to be there are there now. I used to count hundreds of tri-colored bats in there. Now, we鈥檙e counting 30. It has definitely affected that bat population.鈥

Sharp said data from nine caves in north 黑料天堂 monitored from 2010 to 2017 indicate a reduction of tri-colored bats by 70 to 95 percent. He said counts at two Indiana bat hibernacula over that time period are down 95 percent.

Bats are predators and eat huge numbers of insects, which can be disease vectors. They eat mosquitoes, which can carry several diseases, including Zika. Some of the insects the bats are eating are pest species that damage crops in the state.

鈥淭heir simple presence can deter pest species from infesting crops,鈥 Lewis said. 鈥淚f you have bats working a field, you鈥檙e less likely to have insects that are going to eat the corn.鈥

Sharp said bats provide at least $3.7 billion in pest control service to agriculture annually in the U.S., according to a 2011 scientific study.

Vicky Smith of A-Z Animals shows off her sleeping big brown bat.

Lewis said human-bat interaction most often occurs at dusk and dawn, especially around street lights, but bats are active all night.

鈥淏ats will sometimes take a nap in the middle of the night,鈥 she said. 鈥淏ut they鈥檙e not roosting. They鈥檙e just getting a little rest before they go back out and eat more insects. The street lights attract insects, so it鈥檚 kind of like McDonald鈥檚 for the bats.鈥

Another area of concern for bat researchers and the public in general is the fact that bats can be rabies vectors. Lewis said this adds to the stigma of bats but that rabies does not appear to occur at a higher rate in bats compared to other wildlife. Sharp said rabies studies in bats showed infection rates of less than one percent in wild animals.

鈥淏ut there鈥檚 an extremely important distinction,鈥 she said. 鈥淲hen humans encounter a bat, they are not interacting with the regular population of bats. They are interacting with a bat that is acting extremely abnormally because bats avoid us.鈥

Sharp said rabies can be transmitted by a bite from an infected animal or by bat saliva entering an open wound. Sharp and Lewis said to seek immediate medical advice if you suspect contact with a bat resulted in either of those situations. If the bat is incapacitated or captured, take the animal to have it tested for rabies.

鈥淚f you鈥檝e had contact with a bat, it鈥檚 highly advisable to have that bat tested because rabies is 100-percent fatal if symptoms appear,鈥 she said. 鈥淚t鈥檚 just not worth the risk. Anybody who works with bats at the Blitz has pre-exposure vaccinations. Anybody who hasn鈥檛 had vaccinations cannot touch a bat. We鈥檙e having fun, but we have real rules that we will not bend.鈥

One of the presenters at the Bat Blitz was Vicky Smith of A-Z animals in Auburn. Smith, who has taught thousands of school kids about bats and their role in our ecosystems, dispelled several myths associated with bats.

鈥淥ne is 鈥榖lind as a bat,鈥欌 Smith said. 鈥淏ats are not blind. Bats have tiny eyes, but we鈥檝e actually discovered something about their echolocation, the way they use sound waves to locate the insects. What we found was that once they get close, they zoom in with their eyes on the insect. When they scoop it to their mouth with a wing or their tail membrane, they use their eyes for up-close work. Another myth about their eyes is that light hurts their eyes. That鈥檚 not true.鈥

Another myth is that bats will get tangled in your hair, especially folks with long hair.

鈥淏ats will come close to you,鈥 she said. 鈥淵ou are not a food source, but you have attracted their food source by breathing out carbon dioxide, which attracts mosquitoes and other bugs. If the bat echolocates and sees a buffet flying around your head, he鈥檚 going to fly to that buffet. They will fly quite close to you in the dark, and that can be quite scary. We believe that鈥檚 how that myth got started.鈥

A misconception is that a bat, which belongs to the order Chiroptera (winged mammal), is just a mouse with wings.

鈥淏ats are not rodents,鈥 Smith said. 鈥淭hey are about the same size, but a bat typically gives birth to one pup per year. A little mouse about the same size can give birth to about 144 babies per year. Another difference is tooth structure. The teeth in a bat are more like dogs鈥 and cats鈥 with large canines to crunch the exoskeletons of the insects.鈥

Although outreach and education are important, Lewis said the main goal of the Blitz is to catch as many bats as possible to assess the population in that area.

For Lewis, catching bats during the Bat Blitz is just a continuation of her infatuation with the species.

鈥淚鈥檝e been doing this for 20-something years,鈥 Lewis said, 鈥渁nd I still love it.鈥

Abigail Odom of Eufaula, flanked by Nick Sharp on the left and Vicky Smith, won the youth art contest with a water color of a fruit bat.