In many parts of the world, summer means outdoor activities and biting insects. Thirsty little bloodsuckers include mosquitoes, ticks, biting flies, lice, bedbugs, and fleas. Mosquitoes belong to the Culicidae family and are found on every continent except Antarctica. Black flies, horse flies, and deer flies range from five millimeters in length to 25 millimeters. They deliver painful bites. Body lice, head lice, and crab lice latch on for a lifetime, dining on their host’s blood. Of lice varieties, only the body louse transmits disease. Bedbugs lurk in mattress seams, electrical outlets, cracks in flooring, shoes, upholstered furniture, carpets and can survive for months without feeding. When they do find a host, they gorge themselves. Fleas move from animals to humans with equal enthusiasm and carry disease, most notably bubonic plague. Chiggers, deer and dog ticks, mange mites, and other biting bugs burrow under the skin to suck their hosts’ blood. Ticks transmit Lyme disease and Rock Mountain spotted fever.