Egg embryo is adequately developed it hatches, i.e. breaks out of the egg's shell. Some embryos have a temporary egg tooth they use to crack, pip, or break the eggshell or covering. The largest recorded egg is from a whale shark, and was in size. Whale shark eggs typically hatch within the mother. At and up to , the ostrich egg is the largest egg of any living bird, though the extinct elephant bird and some dinosaurs laid larger eggs. The bee hummingbird produces the smallest known bird egg, which weighs half of a gram (around 0.02 oz). Some eggs laid
François Lays April 1785, although even then his relationship with the trio of rebel singers did not improve very much. In a report to his superiors, Dauvergne described Lays as the black sheep of the group, Rousseau as a "nice young man", if only he had spent less time in the company of Lays, and Chéron as another "nice young man" (with the mind of a twelve-year-old), but scared of the beating Lays and Rousseau had promised him if he betrayed their alliance. In the end, the three had to bow to pressure from the theatre management, although not before being promoted