Burrowers are one of the tougher creatures lurking in Underrail. They are egg-laying insectoids that can burrow through solid rock, whence their name came from. They are not a very common sight in Lower Underrail, but apparently they are more numerous in Deep Caverns.
They come in three varieties - adult burrowers, burrower spawn and burrower eggs. Both adult burrowers and spawn may drop poison glands and insectoid salivariums as loot.
Adult burrowers. Real mean creatures. Tough carapace, dangerous attacks and ability to summon spawn.
They defend themselves by spitting poisonous thorns and they also lay eggs, which will burst into burrower spawn surprisingly quickly.
Burrower spawn are smaller, young burrowers. Nowhere nearly as dangerous as fully-grown burrowers, but they tend to appear in groups and can be spawned by adult burrowers.
These are the eggs laid by adult burrowers.
Burrowers seem to be territorial creatures and once they dig their way into a suitable location, they form large hives filled with burrower eggs. If you encounter clusters of bright red eggs, beware. You have located a burrower hive, and burrowers are close by.