Zombat
Zombats are Pre-Hardmode enemies that spawn on the surface at night, similarly to Zombies. Like other bat enemies, they attempt to attack the player by flying through the air and swooping at them, but it acts erratically due to its zombification, often flying too low or high and bumping into the ground. It tends to spawn in swarms with other Zombats, and will attempt to stick together and mob the player. During the day, they will instead attempt to flee from the player like other night-based enemies, moving off-screen and despawning.