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
Caroline Bird have been published in several anthologies and journals including "Poetry Magazine", "PN Review", "Poetry Review" and "The North" magazine. Her poems and a commissioned short story, "Sucking Eggs", have been broadcast on BBC Radio 4. A member of the Royal Court Young Writers Programme, Bird is also a playwright. She was part of the Bush Theatre's 2011 project "Sixty-Six Books", for which she wrote a piece based on a book of the "King James Bible" In February 2012, Bird presented her "Beano"-inspired show "The Trial of Dennis the Menace", featuring original music by Matt Rogers, which was performed in the