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Keying out a captured bat.No, this one is not an Eptesicus.
 
The presence of a small flap of skin extending beyond the cartilagenous calcar, a keeled calcar, distinguishes some Myotis species.
 
The fringe of the fringed myotis (Myotis thysanodes).
 
Small cyalume light tags enable tracking bats after release. We attached these using nontoxic school glue. The bats will groom them off after returning to their roost. (Patricia Ormsbee photo.)
 
A western pipistrelle (Pipistrellus hesperus) attached to a zipline tether, which is made from elastic sewing thread.
 

Acquiring a recording from a bat flying on a zipline. (Michael Durham photo.)

  A bat flying on a zipline. (Michael Durham photo.)

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Please note: The hands holding the bats are those of trained handlers possessing pre-exposure rabies vaccination (an essential precaution for handling any wild mammal, not just bats). Never attempt to handle any wild mammal without appropriate training and vaccination.