I added the common bat (modeled after the Mexican Free-tailed Bat) to Red Ash. This animals fit into the miniature size category and hunt flying insects at night. Like some other Red Ash creatures these are not a major threat to people but they do carry diseases and live in colonies that count into the millions. So a certain amount of caution should be given or your party could become infected with rabies or worse.
You can read more on them here.
All the Best,