Fennessey Ranch Fennesey Ranch 3,261 Acres of Wildlife Oasis in Refugio Texas About the Ranch Fennessey Ranch is a rich network of meadows, brush, prairie, freshwater wetlands, natural lakes, and riparian woodlands. Learn more Visit the Ranch Fennessey Ranch offers world-class birding and nature trips, photography tours, customized group tours, training opportunities, and more. Learn more Book a Field Trip Field trips to Fennessey Ranch are designed to engage students in fun, hands-on outdoor learning experiences. Learn more History Established in 1834, Fennessey Ranch is a wildlife oasis that is managed by the University of Texas Marine Science Institute. Learn more Research Research opportunities are offered on topics such as habitat mapping, water quality, restoration science, and ecosystem services. Learn more Volunteer Year-round volunteer opportunities are available to work on habitat management, educational programs, and tours of the Ranch. Learn more