After a long watch I did catch them changing shifts!
We can start building up: one week left of incubation. So things are getting really ready now inside the eggs. The embryo's are nearly ready, just need to grow in thsi last week. The first down is growing, the lungtissue is near completion. The eggtooth has grown and is ready. And the ossification of the skelton is in full progress. What's really essential in this last week is that the embryo turns in time, so it is with it's beak towards the aircell and in the middle of the egg. If it doesn't come into the right position in time it will be to late because the space is getting smaller and smaller. Now you will think turn in time? How come? Well peregrine embryo's like all bird embryo's move around in the egg a lot. They are just like human embryo's swimming in fluid surrounded by a membrane. They don't breath air in the egg, but getting their oxygen from the air outside by the complicated blood circulation within the egg and embryo. It is all very , very sophisticated and one of the true miracles of Nature. This tiny top-design incubator.
So our Derby eyases to be are still awfully busy inside getting ready for their birthday!
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