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30 encounters
December 1977 Marion, Williamson County, Illinois Class B #15895

Possible vocalization heard in Marion, Illinois

During a holiday visit in heavy snow, the witness was awakened around 2 a.m. by a very loud, prolonged scream from outside the bedroom window. The witness stayed frozen listening, then found other household members awake, and was told it was probably a cat under the house. The next morning new snow covered the area, and later checks found no sign of cats, leading the witness to note its similarity to recorded alleged vocalizations.

ScreamGrowlHowl
Fall 1975 Pinckneyville, Perry County, Illinois Class B #18584

Possible vocalization heard near Pyramid State Park

The witness was outside at a relative's rural farm at night when a loud, hair-raising vocalization was heard from across a lake. The witness ran to a shed where two relatives were working but had not heard the sound. Horses nearby became agitated and later avoided the area where the sound originated until daylight.

Scream
8 June 1973 Prairie Du Rocher, Randolph County, Illinois Class B #42547

Woman recalls her possible encounter on a farm outside Prairie du Rocher.

The witness was camped alone with a dog near a sinkhole on a farm bluff to feed horses in the morning. After building a fire and cooking, loud grunts, growls and scream-like screeches came from the sinkhole while many young trees shook violently despite little wind. Horses stared then fled, the dog stayed close shaking, and a brief odd odor was noticed. Frightened, the witness doused the fire and left with the dog, and reports avoiding woods since.

VocalizationGrowlScreamMovement onlyOdor
15 August 1967 River Grove, Cook County, Illinois Class A #46494

Memory told of a daytime sighting in Schiller Woods

The witness was resting by the Des Plaines River during a bicycle ride when a hair-covered creature was seen across the river splashing in the water. After the witness coughed, the creature threw large rocks toward the witness, then crossed the river silently and confronted the witness at close range. The witness fled along a trail while hearing a loud howl and screaming and seeing additional shadowy figures across the river.

Full-body sightingSilhouetteRock throwingHowlScream
October 1965 Oregon, Ogle County, Illinois Class B #40475

Memory told of strange occurrences while growing up near Castle Rock State Park

In the fall of 1965 the witness was staying in a trailer on the family property when loud screaming was heard approaching from the direction of the river. The witness and a relative heard something pacing behind the dwelling while the screaming continued, then striking the trailer sides four or five times. The witness fired a gun once from the doorway, after which no further sound was heard that night.

ScreamFootstepsProperty disturbance
BFRO YEAR: 84 to 86 Atwood, Piatt County, Illinois Class B #47469

Memory told of possible vocalizations and footprints found near Atwood

On a winter evening around 10 p.m., the witness opened the door to let a dog out and heard an immense scream-howl from just north of the house. The sound felt like a physical impact and frightened the dog so it would not go outside. The witness's mother also heard the vocalization from inside the house.

HowlScream
spring of 1960 Oregon, Ogle County, Illinois Related account #40475

Scream near Oregon, Illinois

In spring 1960 the witness and family heard terrible screaming from the woods with a horrible smell, and a relative searched outside with a gun and found nothing.

ScreamOdor
BFRO YEAR: 1988-89 IDOC Lake A-41 On The Map, Jackson County, Illinois Class A #44003

Close encounter while fishing remembered near Giant City State Park

The witness was fishing alone at a small wooded lake in the afternoon when brush breaking, snapping trees, and splashing rocks drew attention. The witness turned to see a large muscular creature standing nearby that emitted a loud high-pitched scream. The witness froze, the creature quickly retreated into the woods, and the witness fled down the trail to the vehicle.

Partial sightingScreamRock throwingTree break
Date unknown Warsaw, Hancock County, Illinois Related account #2992

Scream near Warsaw, Illinois

Other hunters in the area reportedly heard a panther-like screech, with local talk of a loose panther.

Scream
Date unknown Illinois #gid://art19-episode-locator/V0/emxwtZ2Fw-5pmgp2LbbBKp6yQuE0M6VuF9UCVxWFsX0

Sasquatch sighting in Illinois

While driving at dusk toward a creek, the witness saw a hairy biped standing on a rock outcropping. While fumbling for a phone he heard a loud screech from the side, looked away, and the figure was gone.

Full-body sightingScream