Differences in production: black flies are oviparous, where the egg develops into a larva in the stomach before giving birth, while green flies are fully oviparous. Differences in food habits: green flies are more sensitive to carrion and often congregate around highly rotting proteins, such as rotting meat and animal carcasses, and are less interested in sugars. The opposite is true for black flies, which are more interested in sugars and also in animal feces.

1, production is different: black flies are oviparous, eggs in the stomach first developed into larvae before production, while the green head fly is completely oviparous.

2, different food habits: green flies are more sensitive to carrion, often gathered around highly corrupted proteins, such as carrion, animal carcasses, less interested in sugar. Black flies are just the opposite, black flies are more interested in sugar, but also interested in animal feces.

3, different places of activity: the green fly's place of activity is mainly outdoors, black flies have a wide range of places of activity.