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 him. The first Restoration was quite mild and the only significant penalty Lays suffered was his dismissal from the former Chapelle Impériale with a resulting loss of income. When Napoleon returned to power for the so-called Hundred Days, Lays was inevitably reinstated in his post and he enthusiastically participated in the "Te Deum" of thanks. The second Restoration of the Bourbons was more serious for Lays. At the express wish of Louis XVIII he was again expelled – this time for good – from the new Chapelle Royale, but in return, in 1816, he was named professor of declamatory singing