My female umbrella cockatoo, just laid an egg, the first will she lay more this was a shock to me?

I have a 24 year old umbrella. She started laying eggs about 10 or 12 years ago out of the blue. She has only ever produced one at a time Sometimes she sits on it for a few days and sometimes she ignores it completely. She produces about 3 eggs a year now.

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Yea, she probably will. Make sure she gets lots of calcium, she needs it for laying eggs. Watch for signs of egg binding. <