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Three Most Common Bats
in Orange County

Yuma Myotis
Flight:  Swift and erratic.

Forages primarily over water surfaces to feed on aquatic emergent insects (caddisflies, flies, midges, small moths, and small beetles).


Peak activity is during the first two hours after sunset in spring and summer.


Roosts:  In natural and artificial structures: cliffs, caves, mines, trees, bridges, buildings.


Habitat:  Occurs w. North America in variety of habitats, especially near permanent water.

Mexican free-tailed Bat
Flight:  Straight & rapid; wings long & narrow.
Forages at high elevations for variety of agricultural pests (primarily moths) at over 25 mph.  Often flies more than 30 miles from roost to foraging area.
Emerges shortly after dusk and returns to day roost before sunrise.
Roosts: In natural and artificial structures: caves, mines, rock crevices, bridges, buildings, and bat houses.
Habitat: Usually in dry, lower-elevation habitats, but also in a variety of others.


Big Brown Bat
Flight:  Slow, straight, and steady.

Forages within a few kilometers of its day roost, feeding on heavy-bodied flying insects (beetles) but also eats mosquitoes, moths, and wasps.

Emerges before darkness and is active, with periodic breaks, until dawn.

Roosts:  In natural and artificial structures: buildings, bridges (night roosts) and sycamore cavities, but also in caves and mines.

Habitat:  Found from Alaska to nor. South America in wide variety of habitats



For more information on Bats, check out these webpages:

Where to find bats in O.C.





Sea & Sage Audubon Society
PO Box 5447 • Irvine, CA 92616 • 949-261-7963