Rallying Species Finds Urban Haven on Potomac Rosilie Island, a spit of land in the Potomac River where bald eagles roost, has a good claim to being the most unlikely wildlife refuge in Greater Washington. It's not a natural island, or even an island at all. Instead, it's an old sand and gravel dump, where enough dirt was piled over the years to create a ragged peninsula. Then there's the noise and bustle of the huge National Harbor construction project, being built on the island's doorstep. And the small matter of the Woodrow Wilson Bridge. Tiny Rosilie holds up the...