Class B First-hand BFRO #13964

Possible vocalizations heard at sundown near the North Rim of the Grand Canyon

25 October 1991 early evening to just after dark Fredonia Or Jacobs Lake Lodge, Coconino County, Arizona 8 witnesses

Account

The witness and seven relatives camped for several nights on a hunting trip and heard repeated double whoop vocalizations each evening from dusk until just after dark. The sounds came from ridges around camp, with a regular source to the west and additional answering sources to the southeast and north on later nights. The witness said the sounds resembled examples on the archive site and were unlike familiar animal sounds of the region.

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

Facts & provenance

Each value names where it came from.

Date
25 October 1991
Stated BFRO report #13964 · BFRO report, labelled fields: Year, Month, Date
Time of day
early evening to just after dark
Stated BFRO report #13964 · BFRO report, “Time And Conditions” section
Place
Fredonia Or Jacobs Lake Lodge, Coconino County, Arizona
Stated BFRO report #13964 · BFRO report, labelled fields: State, County, Nearest Town, Location Details, Nearest Road
Map point
36.40, -112.00 (± 14 km)
Stated BFRO map layer · BFRO published map layer · read with 85% confidence
BFRO map layer point for report 13964 with published boundary
Account type
First-hand
Stated BFRO report #13964 · BFRO report, “Observed” section
Witnesses
8
Stated BFRO report #13964 · BFRO report, “Other Witnesses” section
Witness was
camping on a family hunting trip
Stated BFRO report #13964 · BFRO report, “Observed” section
Source classification
Class B
Stated BFRO report #13964 · BFRO classification label

Evidence & investigation

What the source says was found or done. Claimed evidence is listed as claimed; the Anomadex has not examined it.

Investigated by
TF Zamiski (BFRO)
Follow-up

An investigator spoke with the witness by phone to clarify the whistle-like quality of the whoops.

BFRO report, “Follow-Up” section

Source timeline

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

  1. Published 2006-02-28 Retrieved 2026-09-25 Version 1 Hash 9d7996fe258c
    BFRO - Bigfoot Field Researchers Organization
  2. BFRO map layer Reference
    Retrieved 2026-09-24 Version 1 Hash cfb8a3d423b7
    BFRO - Bigfoot Field Researchers Organization