Bald Eagle Nest - West Mifflin, Pennsylvania, USA

Just outside Pittsburgh, a pair of bald eagles has made an unlikely home in a sycamore tree on a wooded slope above the Monongahela River, right next to a working steel plant.

Their nest is a huge pile of sticks wedged into a fork of the tree, with the river and a bridge showing through the branches beyond. The eagles stay in the area all year, but things really get going in late winter when the eggs are laid.

Once the chicks hatch in spring, the parents keep flying in with fish from the river and tearing it into bite-sized pieces for them. The eaglets grow fast through the summer, and by the end of it they're ready to take their first flights.

Did You Know? In 1983, Pennsylvania had just three nesting pairs of bald eagles left. Today there are hundreds, and eagles like these now nest on rivers that were once among the most polluted in America.

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