Bnahabra are giant pink wasps. They will spit out defense down saliva at you from their butts, or they will sting you. Sometimes their stings are harmless, merely stopping you up for a second and dealing damage, but other times they will sting you with paralyzing venom which will leave you paralyzed. No fun if you're in the middle of a larger hunt! Because Bnahabra like to flit around, they can be very hard to hit, too!
Bnahabra have very fragile bodies. They have a small chance of dropping a body you can carve but if you want to guarantee it, poison them. Poison Smoke Bombs are the most effective but anything with a chance to poison will do.