4 to 5 inches
Q. About how long does it take for the bald eagle's eggs to hatch and how long until it can fly? A. It takes 35 days to hatch, then young in nest 10-12 weeks more unti lthey fledge (fly from nest). Q. How old are they before young eagles can fly? A. At 10-12 weeks, when they leave their nest. Baby eagles probably don't communicate with one another in their eggs. The first egg to be laid is the first egg to hatch. It can take a whole day for the baby to work its way out of the egg--the parents probably don't help the babies get out. And once the babies hatch, the parents don't get rid of the egg shells. Q. How long are the laying and hatching intervals for bald eagles? A. The interval between eggs is usually two to four days, depending upon how many eggs are laid. In 2009, Mom Hornby laid her second egg three days after the first. EGGS A bald eagle egg is slightly smaller than a domestic goose egg. The chick will measure 4 to 5 inches at hatching and weigh only a matter of ounces. Bald eagles incubate their eggs for about 35 days. They begin incubation as soon as the first egg is laid. The second egg usually appears within 36 to 72 hours after the first. Occasionally a clutch of 3 eggs will be produced. Incubating Eggs: 35 days As soon as the first egg is laid, the female and the male take turns incubating. Both male and female eagles form a brood patch--a bare spot on their tummy where they can press their hot skin directly against the eggs or chicks to keep them warm. Eggs are laid a few days apart and consequently hatch in the order they were laid. Female eaglets tend to be larger than their male counterparts. Like most birds of prey, the female adult is also larger than the male. Adult eagles range from 33-35 inches long for males and 35-37 inches for females.
http://www.learner.org/jnorth/www/critters/eagle/826572782.html http://www.learner.org/jnorth/tm/eagle/NestingPhenology.html http://www.hornbyeagles.com/eaglefaq.htm http://www.flagislandwebcam.com/eaglefacts.htm http://www.learner.org/jnorth/tm/eagle/NestingPhenology.html http://www.inhf.org/eagle-faqs.cfm
how long does an female eagle leave the egg to hunt for food