Monarch Butterfly
These ones will make you say, "Oooh!"
Have you ever gone outside and seen an orange butterfly and thought, "Wow, that looks so cool?" Well I have, and chances are you've seen a monarch butterfly too. These bright creatures are actually incredibly poisonous, as they eat the toxic plant milkweed when they are caterpillars, and their pretty orange appearance is actually to ward away any birds or other animals that might want to make the butterfly its next meal. It's basically a flying hazard sign, saying "Hey! You don't wanna try eating me buddy, I got a job to do."
Owl Butterfly
Next up is more a cool looking butterfly than pretty, but it's the owl butterfly. These darker colored butterflies have a secret weapon against anything that wants to eat them. While they may not be poisonous, these guys have huge spots on the bottom of their wings that looks like the eyes of owls. If something gets too close, these butterflies unfurl their wings to scare off anything that might want to eat them, basically saying, "Hey man, you don't wanna mess with an owl, do you? That's what I thought."