|The following is based on information from Van Buren design documents and is not canon.|
The bats aren't much of a threat to the player character (they'd rather eat fruit and bugs). If killed off anyway, then manti swarms become possible as a random encounters near the town, and the float text of the Blackfoot in town mention the increased number of mantis from time to time.
Character type completion breakdown
- CombatBoy - Kills!
- ScienceBoy - Can poison them!
- DiploBoy - Can talk some younger tribals to help him kill the relatively harmless giant bats!
- Stealth Boy - Can sneak about the bat lair during the day and is less likely to wake them all up when murdering sleeping bats!