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This is Scientific American's 60-second science. I'm Christopher in Talata. Got a minute?

Florida's Everglades are home to lots of large wading birds, like egrets and herons.

But the glades also have lots of raccoons and possums.

And for the mammals, the bird's nests are an all-you-can-eat buffet.

And when an invasion occurs...

Sometimes thousands of birds will

abandon their nests and just leave. There's just littered remains of dead chicks and eggs that have been

eaten. Lucas Nell, an ecologist at the University of Georgia. Nell says that in order to seek protection

from their furry foes, birds actually prefer to build their nests in plots of

swamp with a resident alligator. In fact, in one study, a graduate student planted fake

alligators, and the birds seemed to prefer to build nests close to them.

Where there's a water source or alligators, so it's kind of this moat of protection

around these colonies.

Nell and his colleagues took to the Everglades at night,

hunting for gaiters near and far from nests.

You have to use the spotlight, and you see the little demon eyes shining out of the marsh.

They lassoed the gators, pulled them into the airboat, and took blood samples and body measurements.

...