House Centipedes originated in the Mediterranean region but have spread worldwide. They are small, yellow-green nocturnal insects that have 15 pairs of legs and can move very fast. They are mostly found in moist, damp areas such as bathrooms and basements and they are very sensitive to light. They eat spiders, bed bugs, termites, cockroaches, silverfish, ants and other small insects. House Centipedes can live outdoors under rocks and wood but need environments that protect them from dehydration and cold weather. Most House Centipedes are harmless to humans, but their sting can be similar to a bee sting.