Rudolf von May has seen some pretty wild things in Peru’s Amazon rainforest. There, caught on a team member’s cell phone video, was a giant tarantula, about the size of a dinner plate, weeble-wobbling through the leaf litter with the body of what was later identified as a mouse opossum hanging from its fangs. SHOCKING SCENE When researchers working in the Peruvian Amazon rainforest heard scrabbling in the leaf litter, they shined their flashlights on the ground and witnessed something never documented before: a dinner plate–sized tarantula (Pamphobeteus sp.)