Wake up! In spring animals that lay dormant over the winter begin to wake up, as old friends that migrated south arrive. The refuge becomes very lively as choruses of wood frogs and spring peepers sing mating songs, and colorful warblers flit and flutter around the refuge. Chipmunks and ground squirrels scamper around on their never ending search for food. Use the spotting scopes at the observation deck to watch waterfowl while listening to them fill the air with their calls. Visitors at this time may be lucky enough to see the mating dance of the sandhill crane.