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Heron Pond-Little Black Slough Natural Area
Heron Pond-Little Black Slough Natural Area
Heron Pond-Little Black Slough Natural Area is the largest remaining cypress-tupelo swamp in Illinois. The site contains a heron rookery and the valley is an outstanding example of alluvial, colluvial, and lacustrine sedimentation within an entrenched meandering valley system.
Location: Johnson County, IL
Year designated: 1972
Acres: 6,762
Ownership: State, Private
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Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.
Last Updated: June 28, 2012
