Why are ladybugs red with black spots?

Behavior, environment and genetics are reasons why some ladybugs are black with red spots. The black-bodied, two red-spotted, twice-stabbed lady beetle (Chilcocorus stigma) of Canada and of the United States fits into light-filtered forests and woodlands because of overall dark antennae, body, head and leg coloration. The specific ladybug species in question has red-marked upper wings and red- or yellow-colored abdomen to warn potential predators of unpleasant scents, tastes and textures.