Hi, for those of you interested in turtles below is a photo of a few different species of turtle's eggs showing size comparison and also how a fertile egg 'bands' up starting with a small white spot in the middle of the egg which spreads outwards towards the sides and ends of the egg. This only happens in fertile, viable eggs.
The species from left to right are Broadshelled turtle (Macrochelodina expansa), Saw-shelled turtle (Elseya latisternum), Kreffts turtle (Emydura macquarii kreffti), Mary River turtle (Elusor macrurus), Eastern snake-neck (Chelodina longicollis), and Fitzroy river turtle or White-eyed river diver (Rheodytes leukops).
Expansa1
The species from left to right are Broadshelled turtle (Macrochelodina expansa), Saw-shelled turtle (Elseya latisternum), Kreffts turtle (Emydura macquarii kreffti), Mary River turtle (Elusor macrurus), Eastern snake-neck (Chelodina longicollis), and Fitzroy river turtle or White-eyed river diver (Rheodytes leukops).
Expansa1