A glitch can also be done on this level, similar to the one in Birdday Party Theme 18-3. You will have two White Birds, one Black Bird, and three Yellow Birds. You can use both the White Birds if you want. To perform this glitch, shoot the first White Bird backwards and deploy her egg on top of the Black Bird so that it bounces off of him and then rests between on top of the Yellow Birds. The egg will be stuck there until the first and second Yellow Birds have already gone on the slingshot, causing the egg to then fall down and explode. You can also deploy the egg on top of the Yellow Birds. If you're lucky, it will bounce up, then fall and land on top of the Yellow Birds.
There is a video showing this glitch: http://www.youtube.com/watch?v=pbMXXRwrRes