Of courser the egg came first. Insects lay eggs, fish do, amphibians etc...
If you mean which came first: a bird or that particular bird's egg? Than the answer is the bird
The bird, the first of the particular species, appeared via mutation, then it started laying eggs
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
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