Meet the ladybug mimic spider. Ladybugs are bright red with black spots. This intense coloration is a warning to predators that they don't taste very nice. This is known as aposematic (“warning”) coloration. There are plenty of examples of this is nature - monarch butterflies, bees, wasps and skunks all have aposematic coloration. Their colors act as a genuine warning to predators to steer clear.
A Brahmin moth caterpillar... Picture: IGOR SIWANOWICZ / BARCROFT MEDIA