Cheyenne Bottoms Wildlife Area is the largest interior marsh in the US. The 41,000-acre complex is located in the central flyway and serves as a top staging area for migrating shorebirds and waterfowl.

More info on Cheyenne Bottoms here (right click on link to open in new tab):
- http://www.naturalkansas.org/cheyenne.htm
- https://www.nature.org/en-us/get-involved/how-to-help/places-we-protect/cheyenne-bottoms-preserve/