User blog comment:BonesMcGee/Brainstorm: Potential savings in using the hurry hatch trick/@comment-5432528-20121128020756/@comment-5544049-20121128042219

What you are seeing is almost certainly a flash of the Dino Den being rebuilt. I see it maybe half the time, and twice the "Dino Den Disaster" has resulted in my Dino Den actually rebuilding. (Game crash while pulling the den out of inventory.)