A few years ago I would have thought this thread a little nutty. Now I know I'll be checking back. By the way, what's the problem with yellow, red and black bugs? Do they taste bad or are they dangerous to eat? And what's Dr. Thunder?
Generic Dr Pepper!
A general observation is that most brightly-colored insects and small animals are poisonous - like poison-dart frogs, or monarch butterflies. Predators recognize their bright colors and avoid them. Camouflaged bugs are usually the tasty ones.
But the colors are warning colors throughout nature. Black and yellow wasps...stings. Red and black poisonous Velvet ants.
The Monarch butterfly larvae are white and black and yellow striped. Let a bird try to eat one and he will never again. They are very noxious as they sequester the toxins from milkweed, their host plant, into their bodies.
Some insects mimic these warning colors and escape their enemies.
Black usually indicates thick hard chitin too.