In the Everglades, birds nest near alligators for safety. But what's in it for the gators?

Birds choose the safest trees to build their nests. In the Florida Everglades, that means living directly above alligator-infested water.

If that sounds like a perilous choice, consider this: Egrets, heron and other long-legged wading birds of the Florida swamps have more reasons to fear raccoons...