Complex sentence: They are not cave-roosting bats, preferring more open environments with some degree of ventilation and light; in more settled areas, they are commonly found roosting under roofs, or inside attic spaces.
Split into simpler sentences: They are not cave-roosting bats, preferring more open environments with some degree of ventilation and light. In more settled areas, they are commonly found roosting under roofs, or inside attic spaces.