The Caterpillar (Elmo in Grouchland)
Butterfly/Moth/Caterpillar
for Butterfly/Moth/Caterpillar in Fictional animals by species
Suggested by brandonwerkheiser1
Obviously, don't nominate any human characters. Hybrids like Cheetah or The Lizard are okay, as are shapeshifters with one set animal form (eg Professor McGonagall.)
