The secondary screwworm, Cochliomyia macellaria, (adult male pictured above).  Although this species can be found throughout the United States, its numbers are being limited by the intense competition with the introduced species Chrysomya rufifacies.

 

One of the hairy maggot blow flies, Chrysomya rufifacies (adult female pictured above).  This species has been recently introduced into the United States.  The larvae of this species are both predatory and cannibalistic.  They often consume the larvae of other fly species and are commonly the sole species recovered from decomposing remains in the southeastern United States.

 

Dr. J. H. Byrd
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