These things will destroy any and all structures you put in front of them. They can and will destroy metal as well as tek. Nothing is safe from these things. If you are on Genesis lunar biome these things are everywhere along with the flying ones. Be careful out there guys.
Relatively easy to kill in the wild and with the new update they can drop electronics, Element Dust, Scrap Metal, and Oil, just like Enforcers and Tek creatures. Gives another safe way to gather Element Dust.