A good rule of thumb is that a female in breeding condition will put about 1/3 of her pre-lay weight into the clutch. So, if you actually weighed her at 4,500 grams at breeding season you could expect her clutch to weigh about 1,500 grams.

The size of the eggs is more variable and even changes for the same female from year to year. But big females do tend to lay some big eggs. Even using 120 grams per egg though you might expect a healthy 4,500 gram female to lay 12 or 13 eggs.

Two of my girls out on loan the last two years laid 13 and 14 eggs but I don't have weights on them. My scale tops out relatively low. But these 10 - 12 year old girls are pretty massive so I can only imagine what the girls that lay 18 eggs and might be over 20 years old look like.

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