Abstract: Objective To explore the number of necrophagous flies and seasonal distribution of common necrophagous flies at present in Beijing. Methods The specimens of necrophagous flies were collected by the methods of animal carcass, trapping and feeding. And the specimens were observed and counted after the classification and preservation. Results The necrophagous flies in Beijing belonged to 4 families, 9 subfamilies, 21 genera and 46 species, and 12 species of them were the first records in Beijing. The necrophagous flies had the characteristics of regional and seasonal distribution. Conclusion The data of seasonal distribution of necrophagous flies and common necrophagous flies in Beijing can provide reference for related research.

Key words: forensic medicine, entomology, necrophagous flies, Beijing