Blow flies belong to the Family Calliphoridae of flies under the Order Diptera. To date, there are approximately 80 species of blow flies in North America. Blow flies are attracted to decaying meat and are typically the first organisms to come into contact with dead animals. The meat of dead animals is essential for larval survival and growth. They are also attracted to plants that give off the smell of rotting meat and as such, can be a pollinator for those plants.