Southern Ant Chelaner antarcticus

Here's a mystery wrapped in an ant: this widespread New Zealand species is so variable in size and color that scientists suspect it might actually be multiple species in disguise. Found everywhere from native forests to farmland—even the remote Kermadec Islands—it's a master of adaptation.

Bonus twist: it farms mealybugs like livestock, harvesting their sweet secretions. The fact that it mysteriously avoids living near certain other ant species has researchers genuinely baffled.