They cling to grass stems and foliage and attach themselves to any animal that brushes against them. Their feeding causes intense itching and irritation but is usually not dangerous, although some species in Asia can spread the human disease scrub typhus. Trombiculidae , order Acari , class Arachnida . The common chigger that bites humans is classified as Trombicula irritans . The chigger, one of 30,000 species of mites, has three pairs of legs as a larva and four pairs as a nymph and an adult.
Chiggers are parasitic on warm-blooded animals.
As larvae they cling to vegetation and attach themselves to any animal that brushes against it. The centipede is a common name for the members of a class of the arthropod phylum. The centipedes are long, segmented animals with jointed appendages and a poisonous bite that in some species is dangerous to humans. Centipedes are often confused with millipedes, which constitute a separate class. The centipede body is divided into well-marked segments, the number of which varies from 12 to more than 100.