Most people consider field mice to be disgusting pests when they invade our houses and consume our food. Tiny mice, on the other hand, are about as charming as it gets in their natural fields and forests.

Harvest mice are adorable and harmless in their natural habitats, but when introduced to new ecosystems, they may become destructive pests. In regions of New Zealand and Australia, the lack of natural predators allows them to proliferate uncontrollably, wreaking havoc on local agriculture and bird populations. Many birds were able to nest successfully in the South Pacific islands until European explorers brought mice there.

You decide if it’s a pest or a small fluff ball after viewing the adorable photographs below!