A migration map collects radar data and displays the path north of various bird species toward Michigan.

The seasonal migration of birds across the globe is a remarkable wonder of our natural world. The National Audubon Society's Bird Migration Explorer provides an opportunity to track some of these ...

The annual spawning migration of horseshoe crabs is underway on Delmarva, with the ancient animals returning in droves to the beaches to lay their eggs in the sand.

This distinguishes them from their close relative, the winter flounder, which spends the colder months closer to shore and doesn’t do the same type of seasonal migration.

A migration map collects radar data and displays the path north of various bird species toward Michigan.