Thunderbird

Giant Bird · Piasa

Teratornis incredibilis (proposed)

3000 BCFirst Report
800+Sightings
Wingspan 12–36 ft (3.6–11 m)Est. Size
activeStatus
🦅 AvianEvidence Tier 2: Physical Traces

Evidence Level

Tier 2/5 — Physical Traces

Overview

A massive bird of prey described in Native American petroglyphs and reported across the American continent. Wingspan estimates range from 12 to 36 feet. Associated with storm-bringing powers in many Indigenous traditions.

Physical Characteristics

Wingspan 12–36 ft, dark plumage, eagle-like talons capable of carrying livestock, smooth or feathered head depending on account.

📍 Habitat & Region

Great Plains & Appalachians, USA · US

Open grassland, mountain thermals, remote wilderness, Alaskan coast

Notable Events

3000 BC

Thunderbird petroglyphs carved throughout the American Southwest

1977

Lawndale, Illinois: Marlon Lowe (10) allegedly lifted briefly by a large bird

2002

Alaska "giant bird" sighted by multiple witnesses near Nome and Togiak

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