HUNTERSVILLE, N.C. -- Savannah and Derek Eagle laid their second egg of 2013 on Friday afternoon at the Carolina Raptor Center.

The first egg landed in the nest on New Year's Day, and the second egg came at 2 p.m. Friday.

This is the earliest that Savannah has laid an egg in her history of nesting at Carolina Raptor Center. First eggs were laid on or around January 27, 2006; January 19, 2007; January 28, 2008; January 25, 2009; January 4, 2010, January 28, 2011, and January 18, 2012.

A second egg is usually laid about a few days after the first, giving what will then be the first chick hatched a decided advantage over the second chick in size and maturity.

(Click here to see more photos of the 2nd egg)

The incubation period for eagle eggs is about 33 to 35 days. This is about average among birds of prey that range from about 24 days for the smallest birds to 54 days for the largest birds. The work of incubation is mostly done by the female, but the male eagle will spell the female for short stints for her to eat and stretch her legs. Derek has been observed feeding Savannah as she sits on the nest.

(Watch Live: Eagle Cam)

The parents must bond to the eggs for incubation to continue. Disturbance by humans may cause the birds to abandon the eggs, so contact is kept to a minimum during this period. This is one of the reasons that the eagle aviary was closed on January 1.

You will notice that the nest has been covered by a tarp in order to protect eaglets from the sun. Because of the warm weather in 2012, the resident bird care staff at Carolina Raptor Center made the decision to build the structure in the off season.

Follow Savannah Eagle on the WCNC Eagle Cam, on Facebook, and Twitter (@Savannah_Eagle) this season.

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