Day: September 21, 2025

Or the bright greens, yellows and oranges of a male iguana. But animals are about five times as likely to use bold color— especially red, yellow, black and white—to warn predators that they’re poisonous, foul-smelling or bad tasting. Think of the red hourglass on the black widow spider. Or the high contrast stripes on bees, wasps and skunks.