Bats in my apt

Okay honestly I’ve had a bat in my room twice, and it’s terrifying. Today (I work third shift now) I got home and I heard a lot of squeaking right above my bed. In the vent, I could’ve sworn. Well, long story short my landlord came by and they did find the bat in the attic, in the insulation. He says there’s no way it can get through mspeed test y vents because they’re sealed off and brand new blah blah. If there’s that one bat they found, is there normally more? I’m just worried usps tracking  because I’m a huge bshowbox aby. Literally any facts help. Plz.