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. The birds seemed to prefer to build nests close to them. “ Where there ’ s a water source, there are alligators, so it ’ s sort of this moat of protection around these colonies .”
Beginning in 35 seconds.