Hermetia ilucens L., a saprophytic insect of the water flies family, can feed on poultry and livestock feces and household waste, and produce high-value animal protein feed. Due to its rapid reproduction, large biomass, wide feeding habits, high absorption and transformation rate, easy management, low feeding costs, and good animal palatability, it is utilized as a resource. Its larvae are called "phoenix worms" and have become a resource insect on par with maggots, yellow mealworms, barley worms, and other insects. It has been promoted worldwide. Originating in the Americas, it is currently widely distributed worldwide (between 40 degrees north and south latitude). In recent years, it has been introduced to China and is currently widely distributed in Guizhou, Guangxi, Guangdong, Shanghai, Yunnan, Taiwan, Hunan, Hubei and other places. It is currently widely used in the treatment of waste such as chicken manure, pig manure, and kitchen waste.

The black soldier fly, also known as the bright flat horned water fly, is a species of insect in the Diptera family of water flies, and is distributed in most tropical and subtropical regions around the world. Many biological characteristics of the black soldier fly are suitable for the transformation of poultry and livestock feces, such as larval saprophagous feeding habits, mixed feeding habits, large appetite, strong stress resistance, overlapping life history and great elasticity, high nutritional value of pre pupae, and migration characteristics before pupation. Therefore, in the research field of converting poultry and livestock feces into insect proteins, the black soldier fly quickly stood out from many Diptera insects and received widespread attention.

The black soldier fly first received attention because it can effectively control the wild population of house flies. Observations have shown that the number of house flies near the fecal pile where the black soldier fly thrives is very small, and adult flies also try to avoid laying eggs on the fecal pile where the black soldier fly larvae feed. Experiments have shown that in mixed feeding, only a small number of house fly larvae can develop to the mature stage. Therefore, the black soldier fly can suppress the house fly population by competing with the larval living environment. According to some unpublished data, the black soldier fly also has a certain inhibitory effect on other types of saprophytic insects (such as yellow powder worms). Further research has shown that the larvae of the black soldier fly can also digest and decompose harmful bacteria in feces during feeding, thereby reducing their harm to the environment. Tomblin et al. conducted detailed observations on the courtship and mating behavior of adult black soldier flies and found that they exhibit environmental factors induced courtship behavior before mating, with strong sunlight being a major factor. Mating behavior is completed during flight, which requires sufficient space in the adult rearing room to complete mating.

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