Many species of necrotic tissue feeders. These are important parasites because they are common and able to parasitize wounds and abrasions on animals. All are non-live tissue feeders and larvae develop in decaying organic material. Identification of larvae depends on morphologic characteristics of the spiracle openings. In many cases, differentiation from primary screwwonn is of importance.
Outbreaks are common in both free-ranging and captive birds.
Dead birds serve as a food source of developing maggots which concentrate the toxin and serve as a means of infection and food for other birds. Treatments Various treatments are available depending on the situation and the parasite involved. Adult Diptera are generally controlled by spray application of products such as Malathion and Pyrethrins. Application can be directed at adult flies or applied to premises. Fly larvae can be controlled by various means, depending on their location.