Tracheal mites live in the breathing or tracheal tubes of adult honey bees and only move outside the host to infest other bees. Honey bee tracheal mites preferentially disperse to adult worker honey bees younger than three days of age (Gary et al. 1989) with female mites primarily dispersing at night (Pettis et al. 1992). In short-lived summer bees only one generation per host is possible but in the winter multiple generations may be reared in each bee (Pettis & Wilson 1996). Tracheal mites are associated with the death of honey bee colonies in the winter when greater than 30% of the bees within a colony are infested.
The Varroa Mite is a parasitic mite that can cause serious trouble to the beekeeper and their bees alike. This tick like mite, around the sized of a pinhead, does its damage by feeding on the bee's hemolymph fluid (akin to bee blood). Mites attach themselves to foraging workers in order to spread themselves from one hive to another. This mite can severally weaken a hive through vampirism like action and through the spread of disease and bacteria. An unchecked mite population will almost certainly lead to the premature death of a honeybee colony. Within the United States, Varroa Mites have the most pronounce impact when compared to other pests within the beekeeping industry. The Varroa Mite is also nearly completely responsible for the decimation and loss of feral honeybee colonies.