Internationally celebrated, Bat Week runs from October 24th through October 31st. This week we celebrate bats to raise awareness for these nocturnal creatures that are often left in the dark. In New Jersey, we have two federally listed bat species, the Indiana bat and the Northern long-eared bat. Several more bats are being uplisted to the threatened and endangered list. Threats primarily include habitat loss and a fungal disease called white-nose syndrome.
To learn more about bats, why they matter, and how you can take action, visit https://batweek.org/ .
The CWF team chose some of their favorite photos taken during their summer bat surveys to share. Enjoy this visual journey into the field to see what a night of mist net surveys looks like.
The CWF Team, Meaghan Lyon, Leah Wells, and Sherry Tirgrath, deploy the mist net at sunset. The long yellow poles are used to raise the net up to 5 meters high.
Leah extracts a bat from the mist net with the assistance of Meaghan. Sometimes crochet hooks are used to help remove the fine netting from the bat. Thick deerskin gloves are always worn to protect from sharp teeth!
As mentioned in the previous weeks, there was one special bat that made its way into the top of our net during the 2022 bat field season that left us overjoyed! One juvenile, female hoary bat (Aeorestes cinereus) was captured during our last week of surveying. This is only the second time this bat has been captured at this site in the Pinelands. Even though the hoary bat is not an endangered species, this is a rare capture for our team because the species is generally flies high and our nets only go as high as 5.5 meters. Additionally, the habitat we survey is more suited to the Northern long-eared bat which like densely cluttered forests, whereas the hoary bat typically is found on the edges of open fields.
The Bat Team setting up a mist-net in the Pine Barrens
Surveying for bats means staying up late and spending a lot of time in the dark. Our evenings begin a few hours before sunset, giving us just enough time to set up for the night. We start off by scouting locations to set up our mist-nets which we use to capture bats. These fine nets, ranging from 8 – 30 ft across and 16 ft high, are attached to tall poles stationed along corridors which bats often use to forage for food. With our nets ready to be deployed, we use the last of the daylight to set up our work station where we will process the bats we hopefully catch.
Biologists Leah Wells and Meaghan Lyon banding a Big Brown Bat
Since 2018, CWF has partnered with the USFWS New Jersey Field Office in completing summer mist netting surveys for bats in the Pinelands. The goal of these surveys is to capture the federally threatened Northern long-eared bat and track these bats to maternity roosts.
Biologists Meaghan Lyon, Leah Wells, and Sherry Tirgrath each hold bats that were captured in nets and processed at camp before being released.
CWF’s team of biologists, along with several USFWS biologists from the New Jersey Field Office, specializing in bat surveying have been at it again for their fourth year of mist netting in the Pine Barrens. Mist netting surveys for bats starts at sundown and continues for five hours through to the early morning. The nets are set up across travel corridors through the woods with canopy cover and wetland foraging grounds nearby. As the bats head to and from their roosts and foraging grounds, they funnel through the corridors and into our nets. The bats are quickly and carefully extracted from the nets and then walked a short distance to our ‘camp’ where they are processed. Processing bats includes identifying bat species, sex, and reproductive status, as well as taking wing measurements.
This Halloween, while you are with friends and family celebrating a spooky evening of fun, I ask you to take a moment and think about one more thing – Halloween without bats. I want you to think about bats today not as the spooky creatures of the night that some people normally think of them as, but as incredible mammals that are invaluable to our ecosystem. In New Jersey, all of our 9 bat species are insectivores. They can eat thousands of insects in one night, protecting our crops and forests from insect destruction, and they pollinate many important foods that we love. A study published in Science magazine estimates that bats’ insect-eating services may be worth as much as $53 billion to US agriculture alone.
Photo courtesy of Blaine Rothauser.
Despite the many environmental and economic benefits bats provide, bat populations around the world are still declining. Bats face many threats, including habitat loss and destruction, human persecution, wind energy development, and White-Nose Syndrome.
Little brown bats. Photo courtesy of Stephanie Feigin.
Devastatingly, we have lost over 6 million bats nationwide due to the spread of White Nose Syndrome (WNS) – a disease caused by a cold-loving fungus called Pseudogymnoascus destructans or Pd. It attacks hibernating bats, disturbing them during hibernation when the bats’ immune response is low, and prevents them from conserving enough stored energy to survive until spring. WNS also causes dehydration and unrest as well as severe wing damage that can prevent bats from flying. Much is still unknown about White-nose syndrome, its spread, and its consequences. The federal government, states, several universities, and organizations like ours are working hard to track and understand this disease.
Big brown bat emerging from barn. Photo courtesy of Mackenzie Hall.
In New Jersey, about 50,000 bats were killed by WNS in the first year (2009) – and we now estimate over 60 tons of mosquitoes and other night-flying insects go undevoured each year from loss of bats. Though bats are one of the most beneficial animals to humans they are still poorly understood and underappreciated, which is why today I ask you to think of them in a new light. Today, think about bats for all of the wonderful benefits they provide, think of them as amazing animals that work hard at night to protect our ecosystems, because we need to make a change.
To protect the bats we still have, it is important that people understand the stress these bats are under. It is important that we re-think how we view bats, remove the spooky stigmas that surround them and appreciate their importance to us. So today, think about bats think about how important they are, how badly we need to protect them and how scary a world without bats would be.
Big brown bat. Photo courtesy of Stephanie Feigin.
Stephanie Feigin is a wildlife ecologist for Conserve Wildlife Foundation.
An eastern red bat found on the roadside. Photo by Gretchen Fowles
I’m starting to see that red bats are rule-breakers. They’re considered forest bats but are happy almost anywhere there are trees, making them common and widespread across North America. Unlike most other NJ bats, they don’t summer in attics or barns or under bark; rather they hang in the tree canopy at the mercy of wind, rain, heat, and cold. They start flying earlier in the evening than other bats, and their females have more young (litters of 3 are common while litters of 5 are not unheard of…most other NJ bats give birth to just one pup per year).
But an unexpected winter sighting makes me awe even more at this colorful little creature. On December 2nd, I was out on a county road in Byram (Sussex) with fellow biologists to plan a culvert project for amphibians. It was a chilly morning – about 45 degrees at 10:00 am – cold enough that I wished I hadn’t left my hat in the car but not quite cold enough to go back for it. On the road shoulder, on its belly, was a red bat. Huh! Red bats are migratory and most head south for the winter. Sometimes they stay as far north as coastal NY and NJ, but a sighting this far inland was surprising. Continue reading “Red Bat Surprise”
Bats get a bad rap – they are blind bloodsuckers that get caught in our hair. But these are all myths and this post is going to bust them!
There are no bloodsucking bats in the U.S. Yes, there are vampire bats in the world (3 species live in the tropics from Mexico to Brazil, Chile, and Argentina) and while they do rely on blood for their sustenance, they don’t view people as a food source. They usually pierce the skin of livestock such as cows, goats or chickens, and gently lap the blood from the wound (similar to how a dog licks water from a bowl).
Bats are not blind. Most species of bats have very good eyesight but they usually depend on their sense of echolocation to navigate through the world. They emit high frequency sounds into their environment and these sounds bounce off objects and back to the bat. The bat is then able to interpret the sounds and create a picture of what their environment looks like.
Bats rarely get caught in human hair. Bats, using their sense of echolocation, can detect objects as fine as a single human hair in total darkness. They are not aggressive animals but they can fly too close to people while feeding on insects or when flying low over water to take a drink.
Beneficial bats eat bugs. Bats are incredible animals and do a lot for us. All nine species of bats found in New Jersey eat insects, consuming one-third of their weight in bugs each night. Bats play essential roles in keeping populations of night-flying insects in balance. Just one bat can catch hundreds of insects in an hour, and large colonies catch tons of insects nightly, including beetles and moths that cost American farmers and foresters billions of dollars annually, not to mention mosquitoes in our backyards.
Bats play a key role in pollination. In other areas of the world, bats are the primary pollinators for many desert plants like the saguaro and organ pipe cactus as well as many species of agave. Bats also help in the pollination of fruits and veggies like bananas, avocados, coconuts, vanilla, dates, and mangoes.
Bats also help in seed dispersal. In fact, seeds dropped by bats can account for up to 95 percent of forest regrowth on cleared land. Bats spread the seeds of almonds, cashews, and chocolate. Did you read that? CHOCOLATE! Bats help us to have more cacao trees, which produces the yummy main ingredient of our favorite Halloween treats!
So instead of screaming and freaking out if and when you see a bat, why don’t you stop and appreciate it and maybe say a little “thank you” for all the wonderful benefits they provide to us. Halloween wouldn’t be the same without bats and the delicious m&m’s, snickers, and Almond joys are made possible because of the wonderful, now better understood, bats of the world.
It is clear to me that White-nose syndrome (WNS) has decimated a large portion of the bat population in New Jersey, or at least at a site where I count bats for the Summer Bat Count. In 2008 (before WNS), I counted 261 bats at the Chatsworth General Store in August. Counting bats may seem like a daunting feat, but at dusk (when there is still a little light) the bats fly out of their daytime roosts. Sometimes, 1-2 at a time or in bursts of 3-4 or more. In August 2009, I counted 169 bats at the store. This past Sunday, I only counted 23 bats. To say the least these results are alarming. I hope that at other locations in New Jersey people are still seeing bats and I hope that WNS does not continue to decimate the population.
