screwworm fly egg weighing
In the course of monitoring the screwworm fly (Cochliomyia hominivorax) mass-rearing program at COPEG, the Panama – United States Commission for the Eradication and Prevention of Screwworm, workers weigh screwworm eggs to measure the impact of variations in the screwworm larval diet. (Photo credit: USDA-APHIS)