These flies are actually houseflies. They have black faces with large red bug eyes. They have green necks with clear wings and various hairs around their body. They carry a blue flyswatter.
When close, they swat the flyswatters back and forth, when near, they fly at you with swatters forward, when far, they bat a small fly egg at you.
- It is quite ironic that a fly carries a flyswatter since flies are killed with them.