by Sarah Royalty Pinkelman & Michigan Nature Association
Word has spread about the essential pollinating behavior of bees and the seed-spreading habit of birds, but the bat, the only flying mammal, is also a significant player in the ecology of animal and plant mutualism. In warmer climates, bats play a similar role as bees and hummingbirds, drinking nectar and pollinating blooms that produce fruits like the banana and agave. Colder climates like Michigan provide a home for insectivorous bat species that consume a significant number of insects that harm humans and plants alike.
Michigan has nine different bat species, but Michiganders most often encounter the little and big brown bats. We see them at dusk gulping insects at a voracious pace, eating from 600 to 1,000 per hour. A mother supporting her young can eat more than her body weight in insects in a single night.
In fact, bats such as big browns feed on specific mosquito species that are vectors for many diseases, including Eastern equine encephalitis. Michigan’s bats also help clear the air of corn and soybean crop–eating insects. While healthy bat populations save the farming industry billions of dollars a year in pesticide use, their benefit to Michigan’s ecology is priceless; by reducing the need for agricultural pesticides, eating disease-carrying insects, and holding a key spot in the nocturnal food web as predator and prey, they’re an integral part of a healthy ecosystem.
Like many species across the globe, bat numbers are declining. Two Michigan species are endangered (the northern long-eared and Indiana bat) and others may follow. A top threat is White-nose Syndrome (WNS), or Pseudogymnoascus destructans. Dr. Allen Kurta, an Eastern Michigan University researcher, has called it the most devastating wildlife disease North America has faced since European arrival. More than 6.7 million bats have been lost to the disease continent-wide since its arrival in New York in 2006. The disease repeatedly wakens hibernating bats, draining their energy in winter when there’s no food available. Most infected bats die from starvation. Dr. Kurta cites an 83% decline in bats since the arrival of WNS.
There are several ways to support our bat populations, and habitat protection is primary. For example, in winter bats hibernate in caves, structures, and abandoned mines, and it is vital to respect the signage at these sights. There are a number of steps you can take at home to help bats, learn more about these and International Bat Week at batweek.org.
The Michigan Nature Association works to protect habitat for rare, threatened, and endangered species across the state. By protecting habitat for target species, we are benefiting the broader population of plants and animals that call Michigan home. Join us on October 24th, 2019 at the Red Cedar River Plant Preserve in Williamston, Michigan with a bat expert from the Bat Association of MSU for our Bat Week Walk, exploring what makes a good bat habitat, and learning more about this ecologically important species. For more information about this event, contact us at email@example.com or 866-223-2231.