The greenish blue bioluminescence given off by millipedes of the genus Motyxia serves as a warning signal to rodent predators not to mess with them — these millipedes also produce toxic hydrogen cyanide.
Pink Dragon Millipede (Desmoxytes purpurosea) is a spiny and toxic millipede aptly named for its bright pink color. It was discovered in Thailand in 2007. These adult millipedes are approximately 3 cm long and live in the open on leaf litter. The millipedes have glands that produce hydrogen cyanide to protect them from predators.