U.S. Fish and Wildlife Service Uplists the Northern Long-eared Bat from Federally Threatened to Endangered

March 22, 2022

On January 28, 2020, a federal judge ruled in favor of a lawsuit, Center for Biological Diversity v. Everson, that the U.S. Fish and Wildlife Service’s (USFWS) 2016 threatened listing of the northern long-eared bat (Myotis septentrionalis; NLEB) did not adequately protect the species under the Endangered Species Act (ESA). Citing best available science, the judge agreed with the challengers that the NLEB instead should be listed as endangered. The USFWS was given until November 2022 to either provide the best available science used to determine NLEB should remain threatened (with a 4(d) rule), delist the species, or uplist it to endangered.

Today (March 22, 2022), the USFWS published in the Federal Register their determination, which is to uplist the NLEB from threatened to endangered.

The northern long-eared bat, Myotis septentrionalis
The northern long-eared bat, Myotis septentrionalis


Why Was the NLEB Listed as Threatened Rather Than Endangered in 2016?

At the time of the 2016 decision, the USFWS had determined that white-nose syndrome (WNS) was such an overwhelming threat to the NLEB that an endangered listing’s blanket prohibitions on all forms of take across the expansive 37-state NLEB home range would not slow the spread and impact of WNS, nor would it benefit the NLEB at the population level. The USFWS decided to focus on finding a solution to WNS. By placing a 4(d) rule on the NLEB in 2016, the USFWS focused on protecting these bats when and where they are most vulnerable: during June and July (which is the pup-rearing time frame) at known maternity roost trees and at known hibernation sites. More information about WNS can be found here.

Why Is the NLEB Being Proposed Listed as Endangered Rather Than Threatened Now?

The USFWS has determined that other stressors are affecting the NLEB besides WNS. Other factors Influencing NLEB viability (though to a far lesser extent than the influence of WNS) include wind energy mortality, effects from climate change, and habitat loss. The combination of these stressors led the USFWS to determine the NLEB should be uplisted to endangered, which means they feel it is in danger of extinction throughout all of its home range.

Based on the best available science, the USFWS has determined the following uncomprehensive list activities may potentially result in ‘take’ as defined in section 9 of the ESA if they are unauthorized by applicable laws:

  1. Unauthorized collecting, handling, possessing, selling, delivering, carrying, or transporting of the species.
  2. Incidental take of the species without authorization in section 7 or section 10 of ESA.
  3. Disturbance or destruction of known hibernacula due to commercial or recreational activities during hibernation.
  4. Unauthorized destruction or modification of suitable forested habitat (including unauthorized grading, leveling, burning, herbicide spraying, or other destruction or modification of habitat) in ways that kills or injures individuals by significantly impairing essential breeding, foraging, sheltering, commuting, or other essential life functions.
  5. Unauthorized removal or destruction of trees and other natural and manmade structures being used as roosts by the northern long-eared bat that results in take of the species.
  6. Unauthorized release of biological control agents that attack any life stage of this taxon.
  7. Unauthorized removal or exclusion from buildings or artificial structures being used as roost sites by the species, resulting in take of the species.
  8. Unauthorized building and operation of wind energy facilities within areas used by the species, which results in take of the species.
  9. Unauthorized discharge of chemicals, fill, or other materials into sinkholes, which may lead to contamination of known northern long-eared bat hibernacula.

What Happens Now?

The NLEB uplisting reveals the USFWS’ decision based on new or updated best available science. No time frame or deadline was given on finalizing the decision outside of November 2022; but, separate guidance for summer surveying for presence/absence of NLEB is to be released within a week of their determination announcement, along with the release of 2022 guidance for summer surveying for Indiana bats.

Now that NLEB is proposed listed as endangered, the 4(d) rule will be removed (by default) and full protective measures will be enforced across its entire 37-state range. For project developers, this likely means a massive increase of potential and occupied NLEB habitat buffers on the landscape, winter tree clearing restrictions in all or portions of 31 states (and DC) where endangered bat species were not previously present, and a likely increase in NLEB presence/absence surveys and conservation efforts due to limiting time frames of forest clearing.

      Ranges of the Indiana bat (blue) and northern long-eared bat (orange) in the United States.

Comments on the proposal may be submitted through May 23, 2022, either electronically, by hard copy mail, or during a virtual public informational meeting on April 7, 2022 from 6:00 p.m. to 7:30 p.m., Central Time, followed by a public hearing from 7:30 p.m. to 8:30 p.m., Central Time. To listen and view the meeting and hearing via Zoom, listen to the meeting and hearing by telephone, or provide oral public comments at the public hearing by Zoom or telephone, you must register here. You may submit comments during the public hearing.

For more background information on the NLEB, including a species profile and range map, visit the USFWS’s webpage at https://www.fws.gov/species/northern-bat-myotis-septentrionalis.

If you have any questions about this news, please contact Ryan Slack (513-237-5051 or rslack@cecinc.com), J.D. Wilhide (615-887-0086 or jwilhide@cecinc.com), or Jackie Rockey (412-249-3140 or jrockey@cecinc.com). CEC will keep you updated regarding the USFWS’s final uplisting decision.

About the Author


Ryan Slack

Ryan Slack is a Principal in CEC's Ecological Sciences Practice at our Indianapolis office. His areas of expertise are in field investigations on wetland delineations, threatened and endangered species surveys, stream habitat assessments, and Clean Water Act permitting.

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