Big Brown Bats

Eptesicus fuscus

One of the most common North American bats, its range extends to northern South America and on many Caribbean islands.

This large bat is active earlier in the spring and later in the fall than most species of northern bat, and have been observed being active on warm winter days. Big Brown's also tend to be the first bats active at dusk. As with other bats water is sought after leaving the daytime roost before the night hunt begins.

Preferred hunting habitat tends to be over bodies of water, forest clearings and riparian vegetation, places where a variety of insects tend to congregate. Certain types of beetles and Hemipteran true bugs are preferred. 

Big brown bats are solitary animals during the summer months, except  when pregnant females form maternity colonies. two is the ordinary brood in the northern part of its range.

Man-made structures tend to be the favorite over wintering spots for this and many other bats.