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They are considered harmless to humans, though they are considered household pests. They are slow-moving and feed on decaying plant matter and leaves. There are more than twelve thousand species in one hundred and forty families throughout the world. They can usually roll up into a ball if they feel threatened. They have elongated bodies, which comprise of at least twenty segments. The segments have double legs and often are two single segments, fused together. The millipede is an arthropod with two pairs of legs that are located on most of its body segments. Millipedes – Long Black Bugs with Lots of Legs Millipede While the bite is not considered fatal, it can be more dangerous to younger children, and anyone who is allergic to bee stings. It is not only painful, but also causes severe swelling, weakness, fever, and chills. Some species are considered dangerous to humans, due to their venomous bite. You may encounter them under leaf litter or dead wood, they are sometimes found inside logs and under stones. There are approximately eight thousand centipede species in the world, of which only three thousand have been described. They are boring in color, usually a red or brown shade. They can be encountered in caves and in homes. They are carnivorous and can grow from a few millimeters to thirty centimeters. The number of legs they have varies from thirty to three hundred and eighty-two, depending on the species. They are venomous and have a painful bite. They have an elongated body, broken into segments. Centipedes – Long Black Bugs in Basement CentipedeĬentipedes are predatory anthropods and are multi-legged insects. They are often found in basements, attics, bathrooms, kitchens, and showers. They prefer moist areas with a relative humidity of up to eighty-five percent. The silverfish has a long lifespan of three years and can be found in Africa, America, Australia, and parts of the Pacific. They can regenerate their antennae and terminal filaments. When they are newly hatched, they are white and develop into a metallic gray with age. They can grow to 25mm with a tapered abdomen. They live on starches and sugars and can be found throughout the world. They have a fish-like appearance when it comes to their movements. Silverfish are small, wingless insects that are a sliver to gray color. Silverfish – Long Black Bugs in Bathroom Silverfish They are also known to create swarms and take over areas of a district, which was seen in 1755 when they appeared in swarms in Gloucestershire, England.

They will also use their pincers for defense.

They are known to cause damage to flowers and foliage, along with some crops.Įarwigs spray a foul odor from their scent glands to protect them against predators. They come out at night where they feed on plants and insects. They are nocturnal and will hide in crevices during the day. They can be found throughout the world, except in Antarctica. They have wings that are folded under their bodies, which they seldom use. Earwigs have forced-like pincers on their abdomens. There are more than two thousand earwig species, spanning over twelve families. Millipedes – Long Black Bugs with Lots of Legs