Biomes O' Plenty Wiki
Amber This page describes a removed feature.
This feature used to be in the mod but has since been removed.

Nether Wasps were a flying mob in the Nether that spawned in Hives. They were hostile and would attack on sight but didn't do much damage when you had armour. Ironically enough, while they lived in the Nether, they are vulnerable to fire

They spawned from Nether Wasp Spawners in the middle of the hive  

However they were later removed when Minecraft was updated to 1.13.2.