also interesting:
The development of the chick begins with the cell division immediately after the fertilization of the Eggs inside the hen. As soon as the egg is laid, however, the development stops until the egg will be incubated.
The eggs of a clutch are laid into a serie, which a laying break follows, which depending on Bird species is different. For most songbirds, it is 24 hours, with egrets, Storks, pigeons and some small birds. For birds of prey 48 hours. For large birds of prey it can even take several days.
I've the source.. if someone is interested...I can put an link.
I hope the translation is good enough to understand it ..
