The Coppeller is a small member of the Scarpanid Family found in Hey! Pikmin. It is a quadrupedal insectoid creature that use its three flower petal-like wings on its back to fly.
The Coppeller is completely harmless and is usually seen transporting things like Sparklium seeds, health and captured Pikmin to its nest. They can be killed in one hit but they are pretty fast and travel in swarm with other Coppeller and sometime Spiny Coppeller which are dangerous to the Pikmin if they are launched on it.
Hey! Pikmin Log
"It carries Pikmin and high-energy objects away somewhere. Back to its nest, I assume. Maybe if I keep observing its behavior, I can begin to understand why my wife has a hard time throwing anything away."