All of these species destroy unhatched eggs and prey upon hatchlings and juveniles. Embryo fossils are the preserved remains of unhatched or unborn organisms. Both nests had chicks and one held a single unhatched egg. The first larvae that hatch in each batch may start by eating the unhatched eggs. Buffy and Xander regain consciousness and find two unhatched eggs in the closet. Unhatched eggs may also be eaten by the parent birds. They may then begin eating unhatched eggs. Unhatched eggs are removed by the parents. The story begins in a chicken coop with many unhatched eggs. The exotic fish also out-competed the dace for food and preyed on unhatched eggs. They also recorded that tropical fire ants, an invasive species, eat unhatched endangered "bukarot" eggs. Some eggs stay unhatched from the previous group and hatch when rain soaks the area. However, unhatched seahorses that have died will create a gas within the male's pouch. The unhatched egg was removed and sent to the University of Sheffield for analysis. The aim of the party was to secure an unhatched egg for scientific study.