Page 15 - Bats of Oklahoma Field Guide
P. 15
Evening Bat
(Nycticeius humeralis)
Wingspan: 10 – 11 inches.
Total Length: 3.25 – 3.75 inches.
Color: Dark brown fur. Ears, wings and tail David Arbour
membrane are black.
Over-Wintering Behavior: Migratory.
Preferred Daytime Roost: Tree crevices and behind
loose bark, as well as buildings and bat houses.
Evening Flight Time: Early evening and just
before dawn.
Feeding/Flying Behavior: Feeds over clearings
and water.
Pup Development Period: Late May to mid-July.
In Hand: Similar to the big brown bat; however, the forearm is less than 1.25
inches and the calcar is not keeled.
Cool Fact: Evening bats may follow other bat species to good foraging grounds.
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2013 Bat Field Guide.indd 15 3/21/13 2:35 PM
