Burke Branch

Burke Branch encompasses 6,231 acres of hilly terrain within the Shawnee National Forest in southern Illinois. The area's lowland topography is defined by the Cretaceous Hills and drained by a network of streams flowing through the Barren Creek watershed, including Barren Creek itself, Crenshaw Creek, Dog Creek, and Sevenmile Creek. These waterways originate in the uplands and move through the landscape as clear-flowing streams, their presence shaping both the forest structure and the ecological communities that depend on them.

The forests of Burke Branch reflect gradients of moisture and elevation across the Cretaceous Hills. Dry-mesic upland forests dominated by southern red oak (Quercus falcata) occupy the higher ground, with northern spicebush (Lindera benzoin) and devil's walkingstick (Aralia spinosa) forming the understory. In lower elevations and along stream corridors, mesic floodplain forests emerge, where baldcypress (Taxodium distichum) and river birch (Betula nigra) grow in wetter soils. The forest floor in these varied communities supports cinnamon fern (Osmundastrum cinnamomeum), strawberry bush (Euonymus americanus), and sessile bellwort (Uvularia sessilifolia). Mesic barrens and acid gravel seeps create specialized habitats where plants such as Buckley's goldenrod (Solidago buckleyi) and Eastern false aloe (Manfreda virginica) establish themselves in conditions few other species tolerate.

The streams of Burke Branch support one of the region's most distinctive ecological communities: freshwater mussels. The federally endangered clubshell (Pleurobema clava), fanshell (Cyprogenia stegaria), and pink mucket (Lampsilis abrupta) inhabit the creek beds, filtering organic matter from the water column. The federally endangered fat pocketbook (Potamilus capax) and sheepnose mussel (Plethobasus cyphyus) occupy similar niches, their populations now reduced to scattered individuals. These mussels depend on specific water chemistry and flow conditions that the Barren Creek system provides. Above the water, the forest canopy shelters three federally endangered bat species—the Indiana bat (Myotis sodalis), gray bat (Myotis grisescens), and northern long-eared bat (Myotis septentrionalis)—which emerge at dusk to hunt insects over the streams and through the understory. The proposed endangered tricolored bat (Perimyotis subflavus) hunts alongside them. Common box turtles (Terrapene carolina) move through the leaf litter of the forest floor, while long-tailed salamanders (Eurycea longicauda) shelter beneath logs and stones near seepage areas.

Walking through Burke Branch, a visitor moves between distinct sensory worlds. Following a trail through the dry-mesic uplands, the forest opens into a relatively sparse understory beneath the red oak canopy, with light filtering through to the cinnamon ferns below. Descending toward Barren Creek or one of its tributaries, the air becomes cooler and more humid; the canopy closes with baldcypress and river birch, and the sound of flowing water grows louder. The transition is marked not only by the change in tree species but by the shift in the forest floor itself—from dry leaf litter to soft, moisture-retaining organic matter. At the creek's edge, the water moves clear over mussel beds, and in the evening, bats emerge from the canopy to hunt above the surface. The mesic barrens present yet another landscape: more open, with lower vegetation and specialized plants adapted to poor, acidic soils. These varied habitats, connected by the flowing streams and the movement of animals through the forest, create the ecological complexity that defines Burke Branch.

The Shawnee Hills region, where Burke Branch is located, was historically used as hunting grounds by multiple Indigenous nations. The Illinois Confederacy, which included the Kaskaskia and Peoria peoples, occupied large sections of the Mississippi and Ohio River valleys in southern Illinois. The Kaskaskia controlled lands stretching from the Mississippi River to Murphysboro until 1803, when they moved to a reservation in Jackson County before eventually merging with the Peoria and moving west. The Chickasaw also historically claimed and used parts of southern Illinois for hunting and seasonal activities. The dense forests and sandstone bluffs of the Shawnee Hills provided diverse wildlife and natural shelters used by various groups over thousands of years. Nearby, Native Americans used the Great Salt Spring along the Saline River as early as AD 800, conducting seasonal salt extraction in the autumn using large ceramic pans. The Ohio River and its tributaries, including Bay Creek near Burke Branch, served as transportation corridors for trade and travel for tribes including the Ho-Chunk, Shawnee, and Illinois peoples.

Early white settlers arrived in the Burke Branch area from the Southeast and established homesteads. The rugged terrain made traditional large-scale farming difficult, and settlers instead made their living from timber. Other settlers elsewhere in the region cleared land for agriculture, but by the early twentieth century, these farms were largely abandoned due to soil exhaustion and severe erosion. Between one and ten rounds of intensive logging occurred in the region before federal acquisition.

The federal government acquired land in Illinois for forestry purposes following passage of the Weeks Act of 1911 and the Clarke-McNary Act of 1924. On June 18, 1931, the Illinois State Legislature passed an enabling act officially inviting the U.S. government to acquire land within the state for forestry purposes. In 1933, the Shawnee National Forest was established by combining two purchase units: the Illini Purchase Unit in the western section and the Shawnee Purchase Unit in the eastern section, which includes Burke Branch. The initial approved purchase area comprised approximately 600,000 acres, though only about 180,000 acres had been acquired by the 1939 proclamation. The 1930s acquisition took place during the Great Depression and addressed the economic collapse of local farming and the need for soil conservation.

The Shawnee National Forest has grown to encompass approximately 289,000 acres of federal land within a larger proclamation boundary of roughly 498,000 acres. In 1990, the Illinois Wilderness Act designated seven parcels, approximately 10 percent of the forest, as protected Wilderness areas. Burke Branch itself was designated as an Inventoried Roadless Area and is protected under the 2001 Roadless Area Conservation Rule.

Vital Resources Protected

Mussel Spawning and Nursery Habitat in Lowland Streams

Burke Branch's network of headwater and tributary streams—including Barren Creek, Crenshaw Creek, Dog Creek, and Sevenmile Creek—provides essential spawning and larval development habitat for nine federally endangered freshwater mussels: clubshell, fanshell, fat pocketbook, orangefoot pimpleback, pink mucket, sheepnose mussel, spectaclecase, and salamander mussel, plus the federally threatened rabbitsfoot and longsolid. These mussels require stable stream substrates, consistent water quality, and host fish populations that depend on intact riparian buffers and low sedimentation rates. Road construction in this hilly terrain would destabilize these conditions across the entire drainage network, making recovery of these nine species functionally impossible once sediment loads increase.

Bat Hibernacula and Foraging Habitat Connectivity

The mature hardwood forest and mesic floodplain forest of Burke Branch support four federally endangered bat species—gray bat, Indiana bat, northern long-eared bat, and tricolored bat (proposed endangered)—which require continuous, unfragmented forest canopy to navigate between hibernation sites and seasonal foraging grounds. These bats forage on insects over streams and within the forest interior; road construction fragments the canopy, creates edge habitat that exposes bats to predators and wind turbulence, and removes the insect-rich riparian vegetation that sustains them. The lowland elevation and mature forest structure make Burke Branch a critical corridor for these species in a region where suitable habitat is scarce.

Rare Barren and Prairie-Forest Transition Ecosystems

The mesic barrens and acid gravel seep communities documented in Burke Branch, particularly around Burke Branch Creek and within the Cretaceous Hills Nature Preserve, represent regionally rare transitional habitats that support fire-adapted species including prairie willow and silky dogwood. These communities depend on periodic disturbance (historically fire) to prevent encroachment by mesophytic trees and maintain their botanical diversity. Road construction would introduce invasive species via disturbed soil and drainage corridors, permanently altering the hydrological and successional conditions that these specialized plant communities require.

Monarch Butterfly Migration and Breeding Habitat

Burke Branch's diverse understory and herbaceous layer within dry-mesic upland and mesic floodplain forests provide milkweed and nectar plants essential for monarch butterfly (proposed threatened) breeding and migration. The roadless condition preserves the continuous vegetation structure that monarchs require to move safely through the landscape during their multi-generational migration. Road construction removes milkweed-bearing understory plants, fragments the canopy that provides thermal refugia during migration, and introduces vehicle mortality risk along corridors that monarchs must traverse.

Threats from Road Construction

Sedimentation and Stream Temperature Increase in Mussel Spawning Streams

Road construction on Burke Branch's hilly terrain requires cut slopes and fill material that erode continuously into the headwater and tributary streams. Exposed soil from road cuts increases suspended sediment loads, which smothers the gravel and cobble spawning substrates that the nine federally endangered mussel species require for reproduction; sediment also clogs the gills of filter-feeding mussels and their host fish. Simultaneously, removal of riparian forest canopy along roads allows direct solar heating of streams, raising water temperatures above the cool, stable conditions these cold-water mussels depend on. Once sedimentation begins, the spawning habitat becomes unsuitable for decades, effectively eliminating reproduction in the affected drainage.

Habitat Fragmentation and Edge-Effect Exposure for Bat Populations

Road construction fragments the continuous mature hardwood canopy into isolated patches, forcing the four federally endangered bat species to cross open areas between foraging and hibernation sites. This fragmentation increases predation risk, exposes bats to wind and weather stress, and disrupts the acoustic and thermal microclimates that guide their navigation. The resulting edge habitat—where forest meets road—also favors invasive plant species and reduces the density of native insects that these bats depend on for food. For species like the Indiana bat and gray bat, which have already experienced population declines from white-nosed syndrome, the additional stress of fragmented habitat reduces survival rates and reproductive success.

Invasive Species Establishment and Barren Community Conversion

Road construction creates disturbed soil corridors that serve as invasion pathways for non-native plants, which establish along roadsides and spread into adjacent barren and prairie-forest transition communities. These invasive species outcompete the fire-adapted native flora (prairie willow, silky dogwood) that define the rare mesic barrens, converting them into homogeneous, species-poor forest. The road surface and associated drainage also disrupts the hydrological conditions—seepage patterns and soil moisture regimes—that maintain the acid gravel seep and barren communities. Once invasive species become established in these specialized habitats, restoration is extremely difficult because the underlying hydrological and soil conditions have been permanently altered.

Culvert Barriers and Mussel Population Isolation

Road crossings of streams require culverts or bridges; culverts frequently create velocity barriers or low-flow conditions that prevent the movement of host fish species (which carry mussel larvae) between upstream and downstream populations. This isolation fragments the mussel metapopulation, preventing genetic exchange and recolonization of areas where local populations have been extirpated by sedimentation or other disturbance. For the nine federally endangered mussels in Burke Branch's streams, culvert barriers would effectively divide populations into non-viable fragments, eliminating the possibility of population recovery even if other threats were addressed.

Burke Branch encompasses 6,231 acres of hilly terrain in the Shawnee National Forest, featuring dry-mesic upland forest, mesic floodplain forest, and mature hardwood stands. The area includes the Burke Branch Research Natural Area, Cretaceous Hills State Natural Area, and Cretaceous Hills Nature Preserve. Recreation here depends entirely on the roadless condition—foot access, undisturbed wildlife habitat, and clear spring-fed waters define what makes this area valuable to hunters, anglers, birders, and photographers.

Hunting is a primary use. White-tailed deer and wild turkey are the main game species; the area is noted for trophy bucks and is managed as a "big buck hotspot" in mature hardwood forest that provides security cover. Eastern gray squirrel and rabbits are also huntable. Quail and pheasant hunting is documented in the Cretaceous Hills State Natural Area (northeast section only). The adjacent Cretaceous Hills Nature Preserve (southwest) is closed to all hunting. All Illinois statewide hunting regulations apply; hunters must possess a valid license and habitat stamp. Deer and turkey permits must be obtained from the Illinois Department of Natural Resources in advance. Within the Cretaceous Hills SNA, a windshield card must be displayed, portable stands may be left unattended September 15 to January 31 if marked with owner contact information, non-toxic shot is required for rabbit and upland bird hunting, and at least 400 square inches of blaze orange must be worn during firearm seasons. Hunting is prohibited within 150 yards of buildings or developed sites, and permanent stands are not allowed. Access is primarily on foot; motorized vehicles and ATVs are prohibited off established forest roads. The area's low hunting pressure and remote foot access—made possible by the absence of roads—are what sustain its reputation as a trophy deer destination.

Fishing occurs in Burke Branch and Barren Creek, which support self-sustaining populations of bluegill, largemouth bass, redear sunfish, crappie, and channel catfish. Burke Branch is documented as having intact fish and insect communities characteristic of high-quality forest streams. No trout stocking occurs in this area. Fishing is strictly prohibited within the Cretaceous Hills Nature Preserve. All Illinois Department of Natural Resources regulations apply where fishing is permitted; anglers age 16 and older must have a valid fishing license and are limited to two poles with no more than two hooks or lures per line. Access is walk-in only; there are no developed parking lots. The area is noted for clear, spring-fed waters and high biological diversity, including rare mussel species that indicate excellent water quality. The roadless condition preserves these intact aquatic ecosystems and allows foot-access fishing in remote, undisturbed stream habitat.

Birding is documented in the area's low-fragmentation forest (over 60% forest cover, 40% interior habitat), which supports interior-nesting species and seven woodpecker species including Pileated and Red-headed Woodpeckers. Summer breeding residents include Indigo Bunting, Summer Tanager, Yellow-billed Cuckoo, Great-crested Flycatcher, Red-eyed Vireo, and Yellow-throated Vireo. Louisiana Waterthrush is found along rocky streambeds like Burke Branch. Cerulean Warbler, a state-threatened species, occurs in mature hardwood habitat. Bald Eagles soar above the forest and water bodies during summer. Wild Turkey and Northern Bobwhite are present. The Burke Branch Research Natural Area is accessible via Forest Road 403 (Massac Tower Springs Road), though the road is old and eroded; most visitors approach on foot. A 1-mile trail provides access to the Cretaceous Hills Nature Preserve. The War Bluff Valley Sanctuary Christmas Bird Count circle (15-mile diameter) overlaps Pope County and includes the Burke Branch area. The roadless character—with no developed facilities and primitive backcountry access along Burke Branch creek—is essential to maintaining the interior forest habitat that these species depend on.

Photography opportunities include Burke Branch, described as a scenic, remote creek with clear water and wading pockets, and Massac Tower Springs, noted as one of the prettiest spots in the Shawnee. Seasonal waterfall features appear after rainfall. Spring brings large displays of Bluebells along creeks in the Mill Springs area. The Cretaceous Hills Nature Preserve contains rare plants including Cinnamon fern, Marsh fern, Royal fern, and Sphagnum moss in acidic seep springs. Morels and other fungi appear near old homesites. Box turtles and Ring-necked snakes are frequent along old forest roads and creek beds. Baltimore Checkerspot butterflies and swallowtail species congregate along woodland streams. Sandstone rock formations and historical artifacts from the Archaic period and early white settlement are present. The Shawnee National Forest is one of Illinois's darkest locations, offering Milky Way views on clear, moonless nights from late spring through early fall; dispersed camping is permitted for astronomy. The absence of roads preserves the scenic integrity of creeks, springs, and forest understory that photographers depend on, and maintains the dark sky conditions that make stargazing possible.