Are brown bats microbats or macrobats?

Need MUCH more information! Where: What country? Are they living in dark places, or in the open [e.g. roosting in trees]? What size: megabats[macrobats] are usually big, micro bats are usually small, [but there are exceptions].

[There is a huge difference between the mega bats [fruit bats] and micro bats [carniverous], because some micro bats in the [northern hemisphere] have adapted to eat fruit/flowers.]

Generally, megabats[fruit bats],[usually] have a head like a fox [that's often why they're called 'flying-foxes]; they roost in colonies in the open [trees]. When roosting, they fold their wings across their bodies. They have small ears and big eyes, using sight to find food].

Generally, microbats [carniverous bats], have a flat [or squashed] face; they roost in dark places; their wings hang by their sides. They have big ears, small eyes, and use sonar to find food.