Some mites live on or in insects. The Orchard Mason Bee is attacked by a species of mite that feeds on the eggs and pollen that the bee has stored in the larval chamber. Those bees that survive the attack are literally covered with mites when they emerge from the chamber in March. I observed one bee that was so covered with mites that it could not fly. Those that can fly, reinfest new chambers with mites as they are preparing them for the next generation.
Mites also can be parasitic on warm-blooded animals, including humans.
Mange is a condition caused by mites on dogs. Chiggers are mites that attack humans. This mite grows in the ear canal of birds and is in such large numbers that the bird becomes deaf. However, the mites only infest one ear of the bird. Ticks are also members of the Order Acarina.