Bats in Attics Might be Necessary for Conservation
Arthur T Knackerbracket has found the following story:
For the little brown bat-a small mouse-eared bat with glossy brown fur-a warm, dry place to roost is essential to the species' survival. Reproductive females huddle their small furry bodies together to save thermal energy during maternity season (summer), forming "maternity colonies." In the face of severe population losses across North America, summer access to an attic or other permanent sheltered structure, as opposed to just trees or rock crevices, is a huge benefit to these bats.
In a new study published in the Ecological Society of America's journal Ecosphere, researchers with Ohio University, University of Kentucky, and the US National Park Service investigate and describe the conservation importance of buildings relative to natural, alternative roosts for little brown bats (Myotis lucifugus) in Yellowstone National Park.
Yellowstone's iconic high-elevation landscape provides abundant natural roosting places but not many buildings. The study involved four visitor areas with several buildings that are known to host bold little brown bats, which are among the few bat species that will make their homes in structures that are actively used by people, allowing humans to get up close and personal. Sometimes, the investigation even involved researchers capturing them by hand.
[...]Over the summers of 2012-2015, researchers tracked individual bats in the park. Using temperature-sensitive radio-transmitters, the researchers measured roost preferences and body temperature regulation in adult male and female bats roosting in buildings, trees, and rocks.
Their results show that reproductive females roost in attics in the study area on 84% of all days for which they collected data, while males roost exclusively in rock crevices or trees. It appears then that outside of maternity colonies, adult males and non-reproductive females will roost by themselves or in small aggregations.
More information: Joseph S. Johnson et al, Buildings provide vital habitat for little brown myotis ( Myotis lucifugus ) in a high"elevation landscape, Ecosphere (2019). DOI: 10.1002/ecs2.2925
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