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While there are ghost pokémon and sentient ice cream cones, many pocket monsters mimic real-world biodiversity: Caterpie, with its bright orange osmeterium, is clearly the caterpillar form of the eastern tiger swallowtail.

“Unless this is a sphinx moth caterpillar who has been stressed and agitated into displaying its osmeterium,” says Jackson.

Osmeterium, os-mē-tē′ri-um, n. an organ devoted to the production of an odour, esp. the forked process behind the head of certain butterfly-larv�:—pl.