Troodon
However, it was later discovered that the eggs belonged to the Troodon when baby Troodon embryos were found inside the eggs. It is now believed that the adults had killed the Orodromeus and brought them back to feed their babies. Troodons laid up to 24 eggs in their nests which were earth mounds. They were able to lay two eggs at a time, so large clutches would take two weeks to lay.