4th hatchling -> 3rd hatchling!

13:28 pm: another egg has just cracked open along the middle line. So the fourth hatchling has now become the third to come out! The 4th with the hole is still struggling. I wonder how the come free. I have the feeling that if the egg cracks along the middle-line it is a much faster process in comparison to the hole-process. The female has just carried out one half of the egg shell.