Heron Pond – Little Black Slough Nature Preserve (also known simply as Heron Pond) is a parcel of protected

wetland A wetland is a distinct semi-aquatic ecosystem whose groundcovers are flooded or saturated in water, either permanently, for years or decades, or only seasonally. Flooding results in oxygen-poor ( anoxic) processes taking place, especially ...

property located in

Belknap, Illinois Belknap is a village in Johnson County, Illinois, United States. The population was 88 at the 2020 census. History File:Belknap-post-office-il.jpg, Belknap Post Office, September 2017 File:Belknap-Community-Church-il.jpg, Belknap Community Chu ...

, approximately 5 miles (8 km) southwest of

Vienna Vienna ( ; ; ) is the capital city, capital, List of largest cities in Austria, most populous city, and one of Federal states of Austria, nine federal states of Austria. It is Austria's primate city, with just over two million inhabitants. ...

, in Johnson County. It was designated a

National Natural Landmark The National Natural Landmarks (NNL) Program recognizes and encourages the conservation of outstanding examples of the natural history of the United States. It is the only national natural areas program that identifies and recognizes the best e ...

in 1972. As part of the Cache River basin, it is classified as a wetland of international importance under the

Ramsar Convention The Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of Ramsar site, Ramsar sites (wetlands). It is also known as the Convention on We ...

Biological history

Heron Pond – Little Black Slough Nature Preserve protects a swath of Cache River drainage upstream from the Post Creek Cutoff. Its biology and geology are representative of the Coastal Plain natural division in Illinois, which is the northernmost extent of the

Gulf Coastal Plain The Gulf Coastal Plain extends around the Gulf of Mexico in the Southern United States and eastern Mexico. This coastal plain reaches from the Florida Panhandle, southwest Georgia (U.S. state), Georgia, the southern two-thirds of Alabama, over m ...

in North America. It combines upland limestone bluffs (Wildcat Bluff), Cache River floodplain, and a drier mesic woodland (Boss Island). The wetland sections of this Nature Preserve protect several

old growth An old-growth forest or primary forest is a forest that has developed over a long period of time without disturbance. Due to this, old-growth forests exhibit unique ecological features. The Food and Agriculture Organization of the United Natio ...

stands of

bald cypress ''Taxodium distichum'' (baldcypress, bald-cypress, bald cypress, swamp cypress; ; ''cipre'' in Louisiana) is a deciduous conifer in the family Cupressaceae. It is native to the southeastern United States. Hardy and tough, this tree adapts to a w ...

and

water tupelo ''Nyssa aquatica'', commonly called the water tupelo, cottongum, wild olive, large tupelo, tupelo-gum, or water-gum, is a large, long-lived tree in the tupelo genus ''(Nyssa)'' that grows in swamps and floodplains in the Southeastern United Stat ...

, and a

heron Herons are long-legged, long-necked, freshwater and coastal birds in the family Ardeidae, with 75 recognised species, some of which are referred to as egrets or bitterns rather than herons. Members of the genus ''Botaurus'' are referred to as bi ...

rookery A rookery is a colony of breeding rooks, and more broadly a colony of several types of breeding animals, generally gregarious birds. Coming from the nesting habits of rooks, the term is used for corvids and the breeding grounds of colony-fo ...

. As of 2023, the Illinois state-champion cherrybark oak can be viewed from the Todd Fink-Heron Pond hiking trail. The name of the Wildcat Bluff upland may commemorate one of the nature preserve's

top carnivore An apex predator, also known as a top predator or superpredator, is a predator at the top of a food chain, without natural predators of its own. Apex predators are usually defined in terms of trophic dynamics, meaning that they occupy the hig ...

s, the

bobcat The bobcat (''Lynx rufus''), also known as the wildcat, bay lynx, or red lynx, is one of the four extant species within the medium-sized wild cat genus '' Lynx''. Native to North America, it ranges from southern Canada through most of the c ...

. River otters can also be found at Heron Pond.

Birdwatchers Birdwatching, or birding, is the observing of birds, either as a recreational activity or as a form of citizen science. A birdwatcher may observe by using their naked eye, by using a visual enhancement device such as binoculars or a telescop ...

visit Heron Pond – Little Black Slough to search for a variety of

raptor Raptor(s) or RAPTOR may refer to: Animals The word "raptor" refers to several groups of avian and non-avian dinosaurs which primarily capture and subdue/kill prey with their talons. * Raptor (bird) or bird of prey, a bird that primarily hunt ...

s, including the

black vulture The black vulture (''Coragyps atratus''), also known as the American black vulture, Mexican vulture, zopilote, urubu, or gallinazo, is a bird in the New World vulture family whose range extends from the southeastern United States to Peru, Ce ...

red-shouldered hawk The red-shouldered hawk (''Buteo lineatus'') is a medium-sized buteo. Its breeding range spans eastern North America and along the coast of California and northern to northeastern-central Mexico. It is a permanent resident throughout most of its ...

, and the

barred owl The barred owl (''Strix varia''), also known as the northern barred owl, striped owl or, more informally, hoot owl or eight-hooter owl, is a North American large species of owl. A member of the true owl family, Strigidae, they belong to the genus ...

, and enjoy a variety of songbirds, including the

Kentucky warbler The Kentucky warbler (''Geothlypis formosa'') is a small species of New World warbler. It is a sluggish and heavy warbler with a short tail, preferring to spend most of its time on or near the ground, except when singing. Description Adult Ken ...

and the

yellow-throated warbler The yellow-throated warbler (''Setophaga dominica'') is a small bird migration, migratory songbird species in the New World warbler family (biology), family (Parulidae) found in temperate North America. Description In summer, male yellow-throa ...

Today

The Heron Pond – Little Black Slough Nature Preserve complex comprises 1,861 acres (753 hectares) of land accessible from U.S. Highway 45. In terms of area, it is the largest natural area owned and operated by the

Illinois Department of Natural Resources The Illinois Department of Natural Resources (IDNR) is the code department of the Illinois state government that operates the state parks and state recreation areas, enforces the fishing and game laws of Illinois, regulates Illinois coal mines ...

. A floating boardwalk that is part of the Todd Fink-Heron Pond Trail allows visitors to enter the bald cypress/water tupelo swamp. The name of the small nearby town of

Cypress, Illinois Cypress is a village in Johnson County, Illinois, United States. The population was 217 at the 2020 census. History Cypress was established in the late 1890s as a stop along the Chicago and Eastern Illinois Railroad, a Class I railroad. A post ...

, appears to commemorate the cypress trees of the upper Cache River drainage, including the groves now protected within the Heron Pond – Little Black Slough Nature Preserve.

References

External links

Heron Pond-Little Black Slough Natural Area
- Illinois Department of Natural Resources {{DEFAULTSORT:Heron Pond - Little Black Slough Nature Preserve Protected areas of Johnson County, Illinois National Natural Landmarks in Illinois Wetlands of Illinois Nature reserves in Illinois Landforms of Johnson County, Illinois Ramsar sites in the United States