Mr. Centipede (James and the Giant Peach)
Millipede/Centipede
for Millipede/Centipede in Fictional animals by species
Suggested by caitlinfrost
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.)
