Learn more about the Sandhill Cranes:
Rowe Santuary, Nebraska
Nebraska Flyway
International Crane Foundation, Wisconsin
Save Our Sandhill Cranes
Wikipedia - Sandhill Cranes
Arizona Game & Fish - Sandhill Crane Cam

Fun Fact
A Miocene crane fossil, thought to be about ten million years old, was found in Nebraska and is structurally identical to the modern Sandhill crane, making it the oldest known bird species still surviving!
(from www.savingcranes.org/sandhill-crane.html)