Kelby was a biologist and manager of National Wildlife Refuges for the U.S. Fish and Wildlife Service for more than 30 years. He has worked with alligators in gulf coast marshes and Canada geese on Hudson Bay tundra. His most recent project was working with his brother Keith of the Louisiana Nature Conservancy on the largest floodplain restoration project in the Mississippi River Basin at the Mollicy Unit of the Upper Ouachita National Wildlife Refuge, reconnecting twenty-five square miles of former floodplain forest back to the Ouachita River.
Kelby was instrumental in the the establishment of Black Bayou Lake National Wildlife Refuge and its development as a premier environmental education site. Kelby has an undergraduate degree in Wildlife Biology and a graduate degree in Wildlife and Fisheries Science from Texas A&M University.
In 2011 he collected his essays that have aired on KEDM into the book Bayou-Diversity: Nature and People in the Louisiana Bayou Country. He is also the author of Flora and Fauna of the Civil War: an Environmental Reference Guide, Iron Branch: A Civil War Tale of a Woman In Between, American Alligator – Ancient Predator in the Modern World as well as many scientific and popular articles. Among other honors Kelby recently received the National Wildlife Federation Governor's Conservationist of the Year Award.
He and his wife Amy live in the woods near Rocky Branch, Louisiana, in a cypress house surrounded by white oaks and black hickories. Kelby's website is bayou-diversity.com.