"In Philadelphia it's rare because there are not large areas they could nest without being disturbed. There's human development and intrusion," Czech said. "So, it's kind of odd to have them nesting in a metropolitan area."
A nest was discovered at the naval yard three years ago, the first bald eagle nest in Philadelphia in more than 200 years.
This year, one was discovered at the John Heinz Wildlife Refuge in Northeast Philadelphia.
Fearing huge crowds, they asked Action News not to disclose the exact location of the nest.
The bald eagle was removed from the endangered species list in 2007. It's still a threatened species, but Czech says this new nest is a sign of the eagle's recovery and promising future.
"People all over may have never seen a bald eagle, and you can come 10 to 15 minutes from your house and observe our national symbol," said Czech.
To learn more about the birds, you can attend a free seminar called "Bald Eagles in Philadelphia: A Successful Recovery" on May 7th beginning at 6:30 p.m. at the Schuylkill Center for Environmental Education.
RELATED LINK: Schuylkill Center for Environmental Education