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Thread subject: Avian Egg
Name Date Message
Marie 04/14/05 01:15 pm The Avian Egg is a miracle of natural engineering. It is light and strong and provides everything a developing bird embryo needs from just after the Ovun is Fertilized until the chick hatches. Birds eggs share many similarities to reptile eggs.The avian eggs shell is not simply a coating of calcium, but a complex laminate of mineral crystals embedded within a weblike matrix of material similar to collegen fibres.Egg embryos develop within an amniotic membrane.These membranes form an enclosed, watery environment that protects the developing fetus, and allows for it to exchange gases with the surrounding world.
Copied from my Ornithology book,,,,,,,,,,unfortunately I didn't write down the author in my hurry. Whoops!
I do know that ospreys incubate immediately when the first egg is laid. That is why the eggs hatch as they were laid with a difference in age between all of the chicks.
RonS 04/14/05 02:43 pm Yes, indeed. Professor Marie is back.!! Thanks, Marie.
Marie 04/14/05 03:09 pm Oh you are welcome.RON...smile. I can barely keep my eyes open so will be heading off to bed shortly since I lost a nights sleep during my travels.Tomorrow will be a better day.
RonS 04/14/05 03:20 pm I also read "somewhere" that the crystals are tapered, with the narrow end pointing towards the inside of the egg. This maks it more difficult for a predator to crack the egg from the outside pushing in, but easier (less difficult?) for a hatching chick to push outwards.
Marie 04/14/05 03:39 pm I read that too Ron....didn't want to give you everything all at once...LOL

Lori 04/14/05 07:50 pm "Thankyou Ma'am!!! :-)))

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Tom Throwe
Last modified: Sat Feb 18, 2006