Anomadex
Class B First-hand BFRO #5137

Scientist hears nocturnal vocalizations near Ontanagon.

20 July 2002 9:30 at night Ontonagon, Ontonagon County, Michigan 2 witnesses

Account

The witness and his family were staying at a friend's cabin on Lake Superior and getting ready for bed around 9:30 p.m. From thick pines to the west, the witness heard repeated loud rising whoops in pairs separated by pauses. He described the sound as very loud, echoing, and primate-like, unlike any animal he knew from years outdoors.

Summary drafted by AI from the source report and checked by code before I publish it. The witness's own words remain with the publisher — read the original report .

What was reported

Every kind of observation in the account. Select one to find other encounters with it.

Sounds

Whoop

Facts & provenance

Each value names where it came from.

Date
20 July 2002
Stated BFRO report #5137 · BFRO report, labelled fields: Year, Month, Date
Time of day
9:30 at night
Stated BFRO report #5137 · BFRO report, “Time And Conditions” section
Place
Ontonagon, Ontonagon County, Michigan
Stated BFRO report #5137 · BFRO report, labelled fields: State, County, Nearest Town, Location Details, Nearest Road
Map point
46.87, -89.31 (± 1000 m)
Stated BFRO map layer · BFRO published map layer · read with 85% confidence
BFRO map layer point for report 5137 (5 decimals, no boundary)
Account type
First-hand
Stated BFRO report #5137 · BFRO report, “Observed” section
Witnesses
2
Derived BFRO report #5137 · BFRO report, “Other Witnesses” section · read with 75% confidence
Witness was
getting ready for bed in cabin
Stated BFRO report #5137 · BFRO report, “Observed” section
Source classification
Class B
Stated BFRO report #5137 · BFRO classification label

Source timeline

Every record this entry is built from, earliest known first. Records are versioned and never edited in place.

  1. BFRO report #5137 Primary
    Published 2002-10-23 Retrieved 2026-09-25 Version 1 Hash bfa10e68fd8e
    BFRO - Bigfoot Field Researchers Organization
  2. BFRO map layer Reference
    Retrieved 2026-09-24 Version 1 Hash cfb8a3d423b7
    BFRO - Bigfoot Field Researchers Organization

The report refers to

  • “credible sighting in 1998 by a bear hunter on the Firesteel river”
    Not in the Anomadex yet
  • “account of an Ontonagon logger who claimed that 2 bigfoots rescued him”
    Not in the Anomadex yet