Instructions
Jump on a large Parabeetle hovering above a vertical trail of coins near the middle of the level. The Parabeetle will sink. Follow the trail of coins to the first star coin.
Jump on the line of smaller parabeetles flying on the bottom of the stage. These parabeetles will fly up to the second star coin.
Go to a group of large parabeetles in the area past the second star coin. Jump on the last large parabeetle in this group, and it will sink behind a cloud. The third star coin is behind the cloud.