Heron Pond – Little Black Slough Nature Preserve, Nature preserve in Johnson County, Illinois, United States
Heron Pond - Little Black Slough Nature Preserve is a large protected area with swamp forests, limestone bluffs, and various forest types. The wetland landscape is accessible through a boardwalk and several hiking trails that allow visitors to explore the terrain.
The area was protected in 1971 and received National Natural Landmark status in 1972 for its ecological value. The designation reflected the scientific importance of this landscape for research and conservation efforts.
The site displays natural communities that typically exist much further south. Visitors notice the swampy forests and water bodies, which offer especially rewarding bird watching opportunities in the early morning hours.
Access is from Highway 45 south of Vienna. The best time to visit is early morning when bird watching is most rewarding and wildlife is most active.
The site hosts some of the state's oldest bald cypress trees and a large heron nesting colony. This rare combination makes it special for nature lovers wanting to see these southern species at the northern edge of their natural range.
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