Ants may benefit the compost heap by moving minerals especially phosphorus and potassium around by bringing fungi and other organisms into their nests. Flies spend their larval phase in compost as maggots, which do not survive thermophilic temperatures. Adults feed upon organic vegetation. Spiders feed on insects and other small invertebrates. Prey include minute nematode worms, mites, larvae, and small earthworms.
Earwigs are large predators, easily seen with the naked eye.
They move about quickly. Some are predators. Others feed chiefly on decayed vegetation.