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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

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