Mouse

The Mouse is a background critter, and cannot harm players. However, unlike most critters, they cannot be harmed by monsters. Mice have only 5 health. They spawn in the Underground and Cavern layers. Their small size and speed can make them difficult to spot even in well lit conditions. Unlike most other critters, NPCs will prevent mice from spawning. A Gold Mouse may also spawn instead. They can be captured with a Bug Net.