08/30/2026
As another summer season begins to wind down at the Ripley Bat Farm, we recently completed our final emergence counts for 2026. With the help of our awesome volunteers, the owners of the bat farm, and our BBH crew, we counted 353 bats at our mid-August count!
Between our pre-emergence visual inspections, dedicated counters, new imagery equipment, and some resilient bats - an estimated 2/3rds of the population comprises the critically imperiled little brown bat - Myotis lucifugus! With the remaining 1/3rd of the population being the big brown bat- Eptesicus fuscus.
Why is this number so important? Compared to our July counts of 575, our recent August emergence count gives us a good picture of how many remaining females are in this maternity colony, as well as the growth potential for the future. By the time we conducted our August count, most of the males had moved from the maternity roost and had begun settling into their “bachelor pads” before the fall swarm.
What makes 353 bats so meaningful is the history behind this colony. At one time, the Ripley Bat Farm was home to more than 1,700 bats! Sadly, when white-nose syndrome swept through our region, it decimated our bat populations throughout the Northeast by 90-99%, bringing this irreplaceable colony down to under 40 bats.
There are still so many questions about what is driving this unique colony’s survival, persistence, and recovery. Are we beginning to see a degree of tolerance to white-nose syndrome within this colony? Is there something unique about where this colony hibernates? Could they be using a hibernaculum associated with potential cave systems along Lake Erie? - We don’t know yet. But through our continued commitment to conservation of this rare colony, we aim to answer those questions through the scientific collection of long-term data, habitat protection and restoration, radio-tracking, and genetic analysis. It is our hope that we can learn from a colony that has survived one of the most devastating wildlife disease events in North American history, in hopes of sharing our research to help bat populations across the nation.
Sadly, the little brown bat remains critically imperiled in the United States and listed as federally endangered in Canada. Yet here at Ripley, we have the privilege of witnessing something hopeful. Conservation in real-time.
Every bat emerging from this roost is part of the story of this colony’s survival. Every pup born here signifies resilience and the opportunity for the survival of the little brown bat. From more than 1,700 to under 40, and now 353 bats - this story of survival and hope for the future at the Ripley Bat Farm is far from over.