Reports of gigantic birds -- much larger than any known bird -- have been reported for hundreds of years. Native Americans call them Thunderbirds. Here are some true accounts and information.
Bob saw a giant bird over Weston, Massachusetts in 1995 and says its wingspan was about 20 feet.
"It was taller than me (I'm five feet tall,) with a wingspan of what had to have been twelve feet. It was very colorful, with a lot of yellow and red tints, but was also brown on its belly and neck, which was also thick...."
This sighting was in New Wilmington, Pennsylvania and its long legs "dangled like a man's legs."
Maybe not a Thunderbird, but the witness describes it as "an amazingly huge black bird-like creature" that attacked some children.
"In the few seconds that I got to study it, I noted it was a dark brown in color and had a huge wingspan, but the wings themselves looked very bat-like, as if skin was stretched between feathers (or bone?)...."
In January, 1976, Greg saw an 8-foot-tall bird that quiently landed about 6 feet away from him.
Today these enormous birds have been seen soaring through the skies of Pennsylvania, and in the past they've even been blamed for snatching children from the ground.
About 60 people saw this Thunderbird while picnicking for Memorial Day in Pennsylvania.
While sitting in traffic, the witness saw this Thunderbird over the suburbs of Pittsburgh in November, 2004.
Kat's family lived in a cul-de-sac in San Benito, Texas when they saw what they think were Thunderbirds flying in and out of the clouds.