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Shape / form From year To year Country Time of day Witnesses Evidence Status Duration Sound Colour Motion Lights Sources include Min photos Min videos Min sources Min score

3D model Narrated

“Harlingen”

Stories3

The Harlingen Ambulance Pterodactyl: James Thompson on Highway 100 (1983)

September 14, 1983 · State Highway 100, about 4 miles east of Los Fresnos, Cameron County, Texas

United States

Cryptid · Creature · 11 sources

14Thinly documented

Big Bird of the Rio Grande Valley: the Lawson and Davies sighting and the Grimaldo attack

January 1, 1976 · Harlingen and Raymondville, Rio Grande Valley, Texas

United States

Cryptid · Creature · 13 sources

29Thinly documented

The Rio Grande Valley "Big Bird" Wave

January 1976 · Lower Rio Grande Valley (Harlingen, San Benito, Brownsville, Raymondville), Texas

United States

Cryptid · Creature · 25 sources

38Partially documented

Names2

Ken Gerhard Person · 5 stories
A cryptozoologist and author, Ken Gerhard keeps returning to the winged things of Texas.
Big Bird Term · 3 stories
A name, and a creature, that the lower Rio Grande Valley gave to its flying monster.

Documents3

AAWSAP DIRD, Concepts for Extracting Energy from the Quantum Vacuum, April 2010 Official release

U.S. Department of War· 2010-04-06· 57 pages· 1 page mentions it
- p. 51 …H., Van Harlingen, D. J., and Clarke, J., "Quantum-Noise Theory for the Resistively Shunted Josephson Junction," Physical Review Letters…
Defense Intelligence Reference Document Concepts For Extracting Energy From The Quantum Vacuum Report

Defense Intelligence Agency· 57 pages· 1 page mentions it
- p. 51 …H., Van Harlingen, D. J., and Clarke, J., "Quantum-Noise Theory for the Resistively Shunted Josephson Junction," Physical Review Letters…
FAA FOIA response 2014-009122 FOIA release

FAA via The Black Vault· 2014· 179 pages· 1 page mentions it
- p. 155 …a flight involving N5555D on June 13, 2012, near Harlingen, Texas 2013‐006799 King Compass Airlines, Inc. 8/16/2013…