What Haunts the Prairie State?

Introduction

What makes Illinois especially interesting is the way its monster legends sit between two worlds. Some are old traditions reshaped by tourism and local identity; others are brief “flaps” of eyewitness claims amplified by newspapers, radio, paranormal investigators and the internet. A careful reader does not need to believe in unknown beasts to find the stories worth following. The real question is often not “is it real?” but “why did this creature become attached to this place, this landscape and this moment?”

Why Illinois keeps producing monster stories

Illinois has the right ingredients for creature folklore: large rivers, backwater swamps, dense southern woodland, agricultural edges, mining country, lakeshore weather, and cities where unusual birds, escaped animals, shadows and rumour can collide. The Shawnee National Forest alone spans 289,000 acres between the Ohio and Mississippi rivers, with oak-hickory forest, wetlands, canyons, bluffs and open land — exactly the kind of varied terrain that lends itself to stories of something glimpsed at the edge of a road or heard beyond a campfire.[US Forest Service]fs.usda.govOpen source on usda.gov.

Southern Illinois matters because many of the state’s strongest cryptid claims cluster there. Murphysboro’s Big Muddy Monster belongs to riverbank and bottomland country. Enfield’s 1973 monster panic unfolded in a small rural community. Shawnee-area Bigfoot stories now overlap with hiking, roadside attractions and local festivals. In the north, the setting changes: Chicago adds a lakefront skyline, airports, parks, harbours and high-density media attention, producing the modern “Chicago Mothman” story rather than a backwoods ape-man tale.[murphysboro.com]murphysboro.comOpen source on murphysboro.com.

The sceptical pattern is just as important. Illinois has real large animals that are rare enough to feel impossible when seen briefly. The Illinois Department of Natural Resources asks the public to report mountain lions, black bears and wolves, noting that all three have had confirmed recent sightings but remain rare visitors. Its mountain lion page records photo-documented or officially investigated animals in western Illinois in 2023 and Pike and Calhoun counties in April 2025.[Wildlife Illinois]wildlifeillinois.orgOpen source on wildlifeillinois.org. That does not explain every monster tale, but it explains why “impossible big cat” reports can move from folklore to wildlife management and back again.

The Piasa Bird: Illinois’s oldest monster is not quite a bird

The Piasa is Illinois’s most famous monster image, but the modern “bird that devours men” story is a complicated blend of real Indigenous rock art, French colonial observation, nineteenth-century literary invention and twentieth-century civic icon. The University of Illinois’s Mythic Mississippi Project describes the Piasa site north of Alton as an Indigenous image seen and recorded by Jacques Marquette and Louis Jolliet during their 1673 voyage down the Mississippi. It also notes that quarrying destroyed the original bluff image in the nineteenth century.[mythicmississippi.illinois.edu]mythicmississippi.illinois.eduPiasa Bird | Mythic Mississippi ProjectPiasa Bird | Mythic Mississippi Project

The first important distinction is that the early description was not of a bird. Marquette’s account described two painted “monsters” with deer-like horns, red eyes, a tiger-like beard, a man-like face, a scaled body and a long tail ending like a fish’s tail; the commonly repeated winged-bird version belongs to later retelling rather than the earliest written description. The Library of Congress preserves Jean-Baptiste-Louis Franquelin and Louis Jolliet’s 1682 map of the Mississippi, a key early visual context for the location and its French-era documentation.[Great Rivers & Routes]riversandroutes.comOpen source on riversandroutes.com.

The familiar Piasa legend — a man-eating winged monster defeated by a heroic chief — was popularised by John Russell in the 1830s. The Illinois State Museum’s RiverWeb archive says Russell’s 1836 article, “The Bird That Devours Men”, called the creature the Piasa Bird for the first time and created much of the legend that still circulates.[museum.state.il.us]museum.state.il.usOpen source on il.us. That matters because it changes how the story should be read. The Piasa is not simply a “fake monster”; it is a real Indigenous image whose meaning was later overwritten by settler storytelling, antiquarian romance and local boosterism.

A stronger interpretation connects the old image to broader Native North American water-being imagery rather than to a literal giant bird. The Mythic Mississippi Project points to archaeology, ethnohistory, ethnography and art history as ways to interpret the image, and highlights its location near the Mississippi and Illinois river confluence, an area associated with dangerous water, rapids and swift currents.[mythicmississippi.illinois.edu]mythicmississippi.illinois.eduPiasa Bird | Mythic Mississippi ProjectPiasa Bird | Mythic Mississippi Project NPR Illinois likewise summarised the scholarly correction bluntly: the “bird” imagery is a myth layered on top of an older and stranger tradition.[NPR Illinois]nprillinois.orgNPR Illinois The Piasa: Bird Imagery Is Just A MythNPR Illinois The Piasa: Bird Imagery Is Just A Myth

Today, the Piasa survives because Alton keeps repainting and retelling it. A 2024 RiverBender history piece traced the 1924 dedication of Herbert Forcade’s Piasa painting, later repaintings after road and bluff changes, and the present mural at Piasa Park, built in 1998.[RiverBender.com]riverbender.comRiver Bender.com100 Years Ago: Piasa Bird Painting DedicatedRiver Bender.com100 Years Ago: Piasa Bird Painting Dedicated In Illinois cryptid terms, the Piasa is the state’s best example of a monster becoming a civic emblem: part ancient art, part misreading, part roadside landmark, and still visually powerful on the Mississippi bluffs.

The Big Muddy Monster: Murphysboro’s police-file cryptid

The Big Muddy Monster, also called the Murphysboro Mud Monster, is the Illinois creature most often compared with Bigfoot, but its local flavour is more river-bottom than mountain forest. The story centres on Murphysboro in June and July 1973, near the Big Muddy River, with reports of a large, foul-smelling, pale or light-haired figure around riverside areas. What gives the case staying power is not a clear photograph or specimen, but the fact that Murphysboro has preserved the case as a local police-file mystery. The city says the case file contains digital scans of 1973 police reports, letters, eyewitness sketches and police photographs.[The City of Murphysboro]murphysboro.comOpen source on murphysboro.com.

The city’s scanned material gives the legend a firmer documentary spine than many cryptid stories. One police-report scan begins with a call on 26 June 1973 from Mrs Harry Ray, who said her daughter and the daughter’s boyfriend had just had an encounter; another scan records a 7 July 1973 report involving officers stopped at Riverside Park by a carnival owner.[The City of Murphysboro]murphysboro.comBig Muddy Monster Merged FileBig Muddy Monster Merged File These are not proof of a monster, but they are evidence that people reported something to police at the time, and that local officers treated the matter as worth recording.

The descriptions vary in the way creature reports often do. Later summaries usually stress a seven-foot, mud-covered, shaggy or light-haired figure with a powerful smell, sometimes compared with river slime or sewage. The setting matters: a muddy river, night-time fear, thick vegetation, summer heat and poor visibility are all conditions that can magnify a brief sighting. The Big Muddy River itself is a real southern Illinois waterway, joining the Mississippi south of Grand Tower and running through a muddy-bottomed watershed.[Wikipedia]WikipediaBig Muddy RiverBig Muddy River

The Big Muddy Monster has also become a local identity marker rather than only a scare story. Murphysboro hosts a Big Muddy Monster festival, and southern Illinois tourism material presents the case as an unsolved local legend rather than a proven animal.[Wikipedia]WikipediaMurphysboro, IllinoisMurphysboro, Illinois That shift is common in cryptid culture: a frightening report becomes a mascot, then a festival, then a way for a town to make its strange archive visible to visitors.

The most cautious reading is that the Big Muddy Monster is a genuine local report tradition with unusually accessible municipal documentation. The case does not establish a new species or even a single consistent animal. It does show how fast a cluster of night sightings, police attention and local talk can create a durable monster with a place, a name and a paper trail.

The Enfield Monster: a short panic with a long afterlife

The Enfield Monster is one of Illinois’s strangest 1970s creature flaps. Reports around Enfield in April 1973 described a short, greyish, three-legged creature with small arms and glowing or pinkish eyes. The best-known witness, Henry McDaniel, said he saw it near his home after hearing scratching at the door. The tale quickly drew press attention, armed curiosity-seekers and paranormal interest, but it also became an academic case study in how rumours and collective behaviour develop.[Wikipedia]WikipediaEnfield MonsterEnfield Monster

The sociological angle is what separates Enfield from many monster yarns. David L. Miller, Kenneth J. Mietus and Richard A. Mathers published “A Critical Examination of the Social Contagion Image of Collective Behavior: The Case of the Enfield Monster” in The Sociological Quarterly in 1978. The JSTOR record identifies the case as a 1973 monster sighting in Enfield and frames it as evidence relevant to debates about social contagion and collective behaviour.[JSTOR]jstor.orgOpen source on jstor.org.

This does not mean everyone involved was lying. A useful sceptical reading is subtler: some people may have seen an animal, misread a shadow, repeated a frightening story, embellished a detail, or reacted to a sudden wave of attention. Reported explanations at the time included escaped exotic animals such as a kangaroo or ape, known wildlife seen under poor conditions, and outright exaggeration. The Enfield story became bigger than its witness base because newspapers, radio discussion, armed “monster hunters” and local gossip created a feedback loop.[Wikipedia]WikipediaEnfield MonsterEnfield Monster

Enfield also shows how close Illinois’s 1970s cryptid stories are to one another in mood. The Big Muddy Monster and Enfield Monster both emerge from southern Illinois in 1973; both involve rural or semi-rural fear, police or press attention, and creatures described with oddly specific features; both then turn into local legend. Their afterlives diverge, though. Murphysboro embraced its monster as a civic oddity with an accessible case file, while Enfield is often remembered as a stranger, more disruptive panic.

Bigfoot in Illinois: forest legend, archive project and roadside attraction

Bigfoot is not native to Illinois in the same cultural sense as the Piasa or Big Muddy Monster. It is a national North American figure grafted onto local landscapes. Yet Illinois has developed its own Bigfoot geography, especially around southern forests, western Illinois archives and Shawnee tourism. Western Illinois University hosts a “Bigfoot in Illinois” library guide focused on sightings and newspaper stories within the state, and its archives page highlights Dr Michael Lorenzen’s interest in primary sources and historical accounts from western Illinois.[wiu.libguides.com]wiu.libguides.comBigfoot in Illinois: HomeBigfoot in Illinois: Home

The strongest Illinois Bigfoot setting is the Shawnee region. The forest gives the story room to breathe: rugged hollows, bluffs, back roads, campgrounds and enough remoteness for a person to imagine a large animal slipping away unseen. But even here, the line between reported creature and playful tourism is clear. Illinois’s official tourism site lists “Shawnee Forest Bigfoot” as a public-art attraction near Garden of the Gods Road in Herod, inviting visitors to meet Sassy the Sasquatch, a social photo-stop version of the creature.[Enjoy Illinois]enjoyillinois.comOpen source on enjoyillinois.com.

Harrisburg has pushed the same idea into festival form. The city’s Shawnee Sasquatch Festival page advertised the fifth annual event in downtown Harrisburg in 2025, with rides, music, food trucks, vendors, a 5K and other activities centred on the “world famous elusive Sasquatch”; Enjoy Illinois lists the 2026 festival as a day of guided hikes, market activity, family events, shopping and live music.[City of Harrisburg Illinois]harrisburgillinois.comOpen source on harrisburgillinois.com. This is cryptid folklore in its most benign modern form: a creature claim becomes a tourism theme, a family event and a symbol of local “forest vibes”.

The evidence question remains thin. Bigfoot reports in Illinois are witness claims, local stories, archive items and enthusiast investigations, not zoological confirmation. That does not make them worthless as culture. They tell us where people imagine wilderness still exists in a heavily farmed and urbanised state, and how Illinois communities borrow a national monster while giving it local roads, rivers and festival tents.

Chicago Mothman: a city-sized creature flap

The Chicago Mothman is a modern urban cryptid rather than an old rural legend. Reports of a large winged humanoid around the Chicago area began surfacing in 2011 and peaked in 2017, according to WBEZ’s 2024 Curious City investigation.[WBEZ]wbez.orgthe case of the chicago mothmanthe case of the chicago mothman The creature is usually described as dark, human-shaped or bat-like, with wings and sometimes glowing red eyes. Its locations — lakefront areas, parks, O’Hare-related stories, harbours and urban night skies — make it feel very different from the river mud and backwoods stories of southern Illinois.

The Chicago case is also a lesson in how internet-era cryptids grow. Patch reported in August 2017 that Fortean collector Lon Strickler had tracked nearly 30 Chicago-area sightings that year, most near Lake Michigan, after receiving earlier reports in 2011.[Patch]patch.comWinged Freak Terrorizes Chicago? Wait'll You Get A LoadWinged Freak Terrorizes Chicago? Wait'll You Get A Load Later summaries often cite higher numbers, but the key problem is sampling. A count of people who choose to submit reports to a paranormal website is not the same thing as a neutral survey of what Chicagoans saw.

That caveat matters because Chicago is full of plausible visual triggers. Large birds, aircraft lights, bats, kites, drones, shadows, weather effects and misjudged distance can all become uncanny in the right conditions. The wider Mothman tradition also carries its own expectations: the original Point Pleasant, West Virginia, reports of 1966–67 were popularly linked to ominous events and later media, making “Mothman” a ready-made label for any dark winged humanoid claim.[Wikipedia]WikipediaOpen source on wikipedia.org.

The Chicago Mothman’s cultural power comes from the mismatch between setting and creature. Bigfoot belongs easily in a forest; a winged humanoid over a lakefront metropolis feels more disorienting. It turns familiar urban spaces into folklore territory: a harbour becomes a sighting zone, a commute becomes a witness story, and a city better known for architecture and traffic gets its own night-flying monster.

Giant birds, lake serpents and other Illinois mystery animals

Not every Illinois creature legend has the same depth of evidence, but several smaller traditions help fill out the state’s monster map.

Thunderbirds and the Lawndale giant-bird story. The most repeated Illinois giant-bird claim is the 1977 Lawndale story, in which a boy named Marlon Lowe was allegedly grabbed or lifted by an enormous bird. Atlas Obscura’s account places the event on 25 July 1977 and frames it within wider “child-stealing thunderbird” lore.[Atlas Obscura]atlasobscura.comAtlas Obscura The Mythic Child-Stealing Thunderbirds of IllinoisAtlas Obscura The Mythic Child-Stealing Thunderbirds of Illinois The story is vivid, but difficult to verify at the level of a biological claim. The more cautious interpretation is that it belongs to a North American giant-bird tradition, with possible confusion involving large raptors, vultures, exaggeration and the natural terror of a child’s close encounter with wildlife.

Lake Michigan sea-serpent reports. Chicago and Lake Michigan have their own water-monster strand. Newcity described a Lake Michigan “sea serpent” tradition reported by Chicagoans for more than a hundred years, while a Daily Herald history round-up placed newspaper excitement over scaled, 40- to 50-foot serpents between 1867 and 1890.[newcity.com]newcity.comThe Lake Michigan Sea Serpent | NewcityThe Lake Michigan Sea Serpent | Newcity These reports are best treated as newspaper-era lake lore: wakes, floating debris, large fish, waves, hoaxes and sensational reporting can all produce serpents on paper.

Phantom cats and real cougars. Big black cats are a recurring rural American mystery, and Illinois is no exception. This is where folklore and real wildlife overlap most sharply. Mountain lions are rare in Illinois, but not imaginary: Wildlife Illinois records confirmed recent animals and explains that bobcats are much smaller and often confused with cougars.[Wildlife Illinois]wildlifeillinois.orgmountain lionmountain lion “Black panther” claims are harder, because verified black cougars are not established in North America in the way popular stories suggest. Still, a fleeting view of a cougar, bobcat, large dog or shadowed deer can keep the phantom-cat tradition alive.

The Tully Monster as a useful boundary case. Illinois even has an official “monster” that is real, extinct and not a cryptid in the usual sense. The Tully Monster, or Tullimonstrum gregarium, is a 300-million-year-old fossil animal from Illinois, first discovered by Francis Tully in 1958 and long puzzling to palaeontologists. Wired called it one of the most vexing fossil species because its classification has been difficult, but it belongs to deep-time science rather than modern monster hunting.[WIRED]wired.comTully's Mystery MonsterTully's Mystery Monster It is a reminder that nature can be genuinely strange without needing a living lake beast.

What counts as evidence in Illinois cryptid cases?

Illinois monster stories are most useful when the evidence is sorted by type rather than treated as one big pile of “mystery”. A police report, a nineteenth-century newspaper item, an Indigenous rock-art record, a tourism page, a podcast, a modern eyewitness email and a festival poster do not carry the same weight.

The Piasa has the strongest historical foundation, but not as a literal bird-monster. Its base is an actual pre-1673 cliff image, early French description and later documentation; its famous man-eating “bird” plot is much later and partly invented.[mythicmississippi.illinois.edu]mythicmississippi.illinois.eduPiasa Bird | Mythic Mississippi ProjectPiasa Bird | Mythic Mississippi Project The Big Muddy Monster has the strongest local case-file tradition: reports were made to police, and Murphysboro now preserves the file publicly.[The City of Murphysboro]murphysboro.comOpen source on murphysboro.com. The Enfield Monster has the strongest social-science afterlife, because academics used it to examine collective behaviour rather than to prove a creature existed.[JSTOR]jstor.orgOpen source on jstor.org.

By contrast, Chicago Mothman and many Bigfoot reports rely heavily on self-selected witness submissions and paranormal collecting. Such accounts can be sincere and culturally important, but they are vulnerable to misidentification, expectation, selective reporting and repetition. WBEZ’s framing of the Chicago Mothman as a question about whether the city ever found out what people were seeing is exactly the right posture: curious, not credulous.[WBEZ]wbez.orgthe case of the chicago mothmanthe case of the chicago mothman

A sensible evidence ladder for Illinois cryptids looks like this:

This approach lets the stories stay interesting without pretending all claims are equally strong.

Why the legends last

Illinois cryptids last because they do different jobs for different communities. The Piasa gives Alton a dramatic river-bluff emblem and a link, however tangled, to deep regional history. The Big Muddy Monster gives Murphysboro a home-grown mystery with a police-file hook. Enfield gives southern Illinois one of the strangest small-town panic stories of the 1970s. Shawnee Bigfoot gives hikers and towns a playful forest identity. Chicago Mothman gives a modern city its own skyline monster.

They also last because Illinois sits at a meeting point of environments and traditions. It is Midwestern farm country, Great Lakes shoreline, Mississippi corridor, southern forest and urban metropolis at once. A state that varied can hold a painted water-being, a muddy river giant, a three-legged rural monster, a phantom cat, a lake serpent and a winged humanoid without any one of them feeling completely out of place.

The evidence-aware answer is not that Illinois is secretly full of unknown animals. It is that Illinois has unusually good conditions for monster-making: real wild landscapes, old visual traditions, sudden animal encounters, sensational newspapers, local pride, and now the internet’s ability to turn scattered sightings into named flaps. The creatures are unproven, but the folklore is very real.

Amazon book picks

Further Reading

Books and field guides related to What Haunts the Prairie State?. Use these as the next step if you want deeper reading beyond the article.

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Mysterious America

By Loren Coleman

Covers many categories of American monster traditions relevant to Illinois.

See on Amazon

Book

Weird Illinois

By Troy Taylor, Mark Moran et al.

Directly explores Illinois legends, hauntings and strange creatures.

See on Amazon

Book

Monsters of the Midwest

By Jessica Freeburg, Natalie Fowler

Places Illinois stories within wider Midwestern folklore.

See on Amazon

Book

Abominable Science!

By Daniel Loxton, Donald R. Prothero

Helps explain why cryptid reports persist.

See on Amazon

Browse more on Amazon:Mysterious AmericaWeird IllinoisMonsters of the Midwest

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Endnotes

1. Source: mythicmississippi.illinois.edu
Title: Piasa Bird | Mythic Mississippi Project
Link:https://mythicmississippi.illinois.edu/native-illinois/piasa-bird/

2. Source: murphysboro.com
Link:https://murphysboro.com/the-big-muddy-monster/

3. Source: jstor.org
Link:https://www.jstor.org/stable/4105917

4. Source: wbez.org
Title: the case of the chicago mothman
Link:https://www.wbez.org/curious-city/2024/09/05/the-case-of-the-chicago-mothman

5. Source: museum.state.il.us
Link:https://www.museum.state.il.us/RiverWeb/landings/Ambot/Archives/vignettes/culture/Piasa_20Bird.html

6. Source: riverbender.com
Title: River Bender.com100 Years Ago: Piasa Bird Painting Dedicated
Link:https://www.riverbender.com/news/details/100-years-ago-piasa-bird-painting-dedicated-76420.cfm

7. Source: murphysboro.com
Title: Big Muddy Monster Merged File
Link:https://murphysboro.com/wp-content/uploads/2023/02/Big-Muddy-Monster-Merged-File.pdf

8. Source: murphysboro.com
Title: Big Muddy Monster Merged File
Link:https://murphysboro.com/wp-content/uploads/2023/04/Big-Muddy-Monster-Merged-File.pdf

9. Source: Wikipedia
Title: Big Muddy River
Link:https://en.wikipedia.org/wiki/Big_Muddy_River

10. Source: Wikipedia
Title: Murphysboro, Illinois
Link:https://en.wikipedia.org/wiki/Murphysboro%2C_Illinois

11. Source: Wikipedia
Title: Enfield Monster
Link:https://en.wikipedia.org/wiki/Enfield_Monster

12. Source: wiu.libguides.com
Title: Bigfoot in Illinois: Home
Link:https://wiu.libguides.com/c.php?g=363805

13. Source: wiu.edu
Link:https://www.wiu.edu/libraries/archives/paranormal-resources/

14. Source: patch.com
Title: Winged Freak Terrorizes Chicago? Wait’ll You Get A Load
Link:https://patch.com/illinois/chicago/winged-freak-terrorizes-chicago-waitll-you-get-load-these-29-sightings

15. Source: Wikipedia
Link:https://en.wikipedia.org/wiki/Mothman

16. Source: newcity.com
Title: The Lake Michigan Sea Serpent | Newcity
Link:https://www.newcity.com/2020/08/07/summer-2020-the-lake-michigan-sea-serpent/

17. Source: wired.com
Title: Tully’s Mystery Monster
Link:https://www.wired.com/2011/01/tullys-mystery-monster

18. Source: Wikipedia
Link:https://en.wikipedia.org/wiki/Piasa

19. Source: Wikipedia
Link:https://en.wikipedia.org/wiki/Bigfoot

20. Source: Wikipedia
Title: Shawnee National Forest
Link:https://en.wikipedia.org/wiki/Shawnee_National_Forest

21. Source: wbez.org
Title: shawnee national forest logging trump administration fast tracking illinois
Link:https://www.wbez.org/environment/2025/12/16/shawnee-national-forest-logging-trump-administration-fast-tracking-illinois

22. Source: youtube.com
Title: Spot the Big Muddy Monster in Murphysboro!
Link:https://www.youtube.com/watch?v=56Nbejoydvg

23. Source: youtube.com
Title: Big Muddy Monster | Monsters and Mysteries in America
Link:https://www.youtube.com/watch?v=Ep3HB89YP98

24. Source: fs.usda.gov
Link:https://www.fs.usda.gov/r09/shawnee

25. Source: wildlifeillinois.org
Link:https://wildlifeillinois.org/report-sightings/report-large-carnivore-sightings/

26. Source: wildlifeillinois.org
Title: mountain lion
Link:https://wildlifeillinois.org/identify-wildlife/mountain-lion/

27. Source: riversandroutes.com
Link:https://www.riversandroutes.com/directory/piasa-bird/

28. Source: nprillinois.org
Title: NPR Illinois The Piasa: Bird Imagery Is Just A Myth
Link:https://www.nprillinois.org/science/2013-10-08/the-piasa-bird-imagery-is-just-a-myth

29. Source: enjoyillinois.com
Link:https://www.enjoyillinois.com/explore/listing/shawnee-forest-bigfoot/

30. Source: harrisburgillinois.com
Link:https://www.harrisburgillinois.com/events/shawnee-sasquatch-festival

31. Source: enjoyillinois.com
Link:https://www.enjoyillinois.com/explore/listing/shawnee-sasquatch-festival/

32. Source: atlasobscura.com
Title: Atlas Obscura The Mythic Child-Stealing Thunderbirds of Illinois
Link:https://www.atlasobscura.com/articles/the-mythic-child-stealing-thunderbirds-of-illinois

33. Source: facebook.com
Title: Shawnee Sasquatch Festival
Link:https://www.facebook.com/ShawneeSasquatchFestivalHarrisburgIL/

34. Source: facebook.com
Title: Shawnee Sasquatch Festival
Link:https://www.facebook.com/ShawneeSasquatchFestivalHarrisburgIL/mentions/

35. Source: facebook.com
Title: U.S. Forest Service
Link:https://www.facebook.com/shawneenatlforest/

36. Source: cryptidz.fandom.com
Title: Piasa Bird
Link:https://cryptidz.fandom.com/wiki/Piasa_Bird

37. Source: cryptidz.fandom.com
Title: Murphysboro Mud Monster
Link:https://cryptidz.fandom.com/wiki/Murphysboro_Mud_Monster

38. Source: cryptidz.fandom.com
Link:https://cryptidz.fandom.com/wiki/Thunderbird

39. Source: folkbestiary.com
Link:https://folkbestiary.com/illinois/

40. Source: rla.unc.edu
Link:https://rla.unc.edu/emas/Franquelin.html

41. Source: hikingwithshawn.com
Title: shawnee forest bigfoot
Link:https://www.hikingwithshawn.com/shawnee-forest-bigfoot/

42. Source: instagram.com
Title: Shawnee Sasquatch Festival
Link:https://www.instagram.com/shawneesquatch/

43. Source: downtownalton.com
Title: piasa bird
Link:https://downtownalton.com/directory/listing/piasa-bird/

44. Source: nprillinois.org
Title: cougars in illinois felis concolor dwells here again
Link:https://www.nprillinois.org/health-harvest/2004-07-01/cougars-in-illinois-felis-concolor-dwells-here-again

45. Source: astonishinglegends.com
Title: chicago mothman
Link:https://astonishinglegends.com/astonishing-legends/2025/10/15/chicago-mothman

46. Source: unresolved.me
Title: The Enfield Monster
Link:https://unresolved.me/the-enfield-monster

47. Source: fs.usda.gov
Link:https://www.fs.usda.gov/r09/shawnee/wilderness

48. Source: etsy.com
Title: Mississippi River
Link:https://www.etsy.com/listing/757234170/mississippi-river-1682-tracing-of-old

Additional References

49. Source: youtube.com
Title: Man Witnesses Mothman Jump Off The Willis Tower In Chicago | Expedition X
Link:https://www.youtube.com/watch?v=u3upSX0jS0A

50. Source: youtube.com
Title: The Legend of Alton, Illinois’ Piasa Bird | Living St. Louis
Link:https://www.youtube.com/watch?v=_r1hQ0gxJXA

51. Source: facebook.com
Link:https://www.facebook.com/hikingwithshawn/posts/bigfoot-finally-spotted-in-shawnee-after-10-years-of-hiking-i-finally-got-footag/1405963524670861/

52. Source: icl.coop
Link:https://icl.coop/brushes-with-bigfoot/

53. Source: hangar1publishing.com
Link:https://hangar1publishing.com/blogs/cryptids/illinois-cryptids?srsltid=AfmBOopO-_01oRqhYUahsYXRBhqHQUYzu9_GKw78pcY4fXV9TanUL-p2

54. Source: facebook.com
Link:https://www.facebook.com/groups/250840638956722/posts/1460316978009076/

55. Source: crimereads.com
Link:https://crimereads.com/essential-reading-for-the-bigfoot-curious/

56. Source: reddit.com
Link:https://www.reddit.com/r/Cryptozoology/comments/1embr2f/giant_sea_serpent_caught_on_weather_camera_during/

57. Source: hangar1publishing.com
Link:https://hangar1publishing.com/blogs/cryptids/illinois-bigfoot-sightings?srsltid=AfmBOopCh5590VUZdW3XpJLswp7Cp1iPJHsZquBL2p8jKXSh4hmM9xSY

58. Source: facebook.com
Link:https://www.facebook.com/101TheEagle/posts/illinois-dept-of-natural-resources-says-there-have-been-only-11-confirmed-mounta/1472168118248249/