what are these butterflies called?

Question

i remember someone telling me about one type of butterfly that looks like another one because that other one is poisionous or something like that, but i cannot remember the names of the butterflies. this is bugging me, i think they are Monarch butterflies and Emperor butterflies but i'm not sure..can anyone help me out?

Answer 1

Monarch butterflies are orange with black veins, and taste terrible because their caterpillars eat milkweed. A bird that eats one of these soon throws up (I have seen a video--imagine a bird ralphing!) and never touches one again.

A viceroy butterfly looks very much like a monarch, but is tasty. It's mimicry of the orange and black pattern of the monarch acts to discourage predators.