What is the incubation period for bald eagle eggs?

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A. The average period is 35 days, give or take a few days. In 2009, the Hornbys incubated the first egg for 35 days; the chick began to vocalize in the shell late that day. The pip (hole) was evident on the morning of the 36th day and the chick was fully hatched in the early morning of the 37th day. The second egg followed suit. more
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