It's based of luck after split the bird to cleared all pigs.
For Utopia 4-16, aim for a one-bird clear, though it is not entirely necessary. Fling the Blue bird to barely clear the highest peak, splitting late to slow down one bird and have it drop onto the bushes on the right side. The other birds should loop all the way around to the ice blocks. Even if not everything falls, use the Lazer bird to clean up.
The Eggsteroid is under the bush underneath the slingshot. Waste all Blue Birds and use the Lazer Bird to claim it.