Heron Pond – Little Black Slough Nature Preserve
| Heron Pond – Little Black Slough Nature Preserve | |
|---|---|
Heron Pond | |
Map of Illinois | |
| Location | Johnson County, Illinois |
| Nearest city | Vienna |
| Coordinates | 37°22′01″N 88°57′00″W / 37.367°N 88.950°W |
| Area | 1,861 acres (753 ha) |
| Designated | 1972 |
| Official name | Cache River and Cypress Creek Wetlands |
| Designated | 1 November 1994 |
| Reference no. | 711 |
Heron Pond – Little Black Slough Nature Preserve (also known simply as Heron Pond) is a parcel of protected wetland property located in Belknap, Illinois, approximately 5 miles (8 km) southwest of Vienna, in Johnson County. It was designated a National Natural Landmark in 1972. As part of the Cache River basin, it is classified as a wetland of international importance under the Ramsar Convention.