List of extraterrestrial beings from AI
Grey-skinned humanoids, usually 1 metre (3–4 feet) tall, hairless, with large heads, black almond-shaped eyes, nostrils without a nose, slits for mouths, no ears and 3–4 fingers including thumb. Greys have been the predominant extraterrestrial beings of alleged alien contact since the 1960s.
Small, greenish-silver humanoids.
Little green men
Diminutive green humanoids. Even though a few abductions have referred to green skin, no report has ever involved anything that would fit the classic cultural stereotype of "Little Green Men". They are included here only for cultural reference.
Humanoids with stereotypical "Nordic features" (tall, blonde hair, blue eyes) and have featured in several cases of contact. It is said they are from Ancient Earth but presenting themselves as ETs in the past, they moved from living on the surface to live underground around the Himalayas area after a natural event.
In West Virginia folklore, the Mothman is a humanoid creature reportedly seen in the Point Pleasant area from November 15, 1966, to December 15, 1967. The first newspaper report was published in the Point Pleasant Register, dated November 16, 1966, titled "Couples See Man-Sized Bird ... Creature ... Something". The national press soon picked up the reports and helped spread the story across the United States. The source of the legend is believed to have originated from sightings of out-of-migration sandhill cranes or herons.
In South Jersey and Philadelphia folklore in the United States, the Jersey Devil (also known as the Leeds Devil) is a legendary creature said to inhabit the forest of Pine Barrens in South Jersey. The creature is often described as a flying biped with hooves, but there are many variations. The common description is that of a bipedal kangaroo-like or wyvern-like creature with a horse- or goat-like head, leathery bat-like wings, horns, small arms with clawed hands, legs with cloven hooves, and a forked tail. It has been reported to move quickly and is often described as emitting a high-pitched "blood-curdling scream".
In cryptozoology, the Mokele-mbembe (also written as "Mokèlé-mbèmbé"), Lingala for "one who stops the flow of rivers", is a water-dwelling entity that supposedly lives in the Congo River Basin, sometimes described as a living creature, sometimes as a spirit. Those that have allegedly seen the creature describe it as a large quadrupedal herbivore with smooth skin, a long neck and a single tooth, sometimes said to be a horn.
Reptilians and Reptiloids
Proponents of the ancient astronaut hypothesis often maintain that humans are either descendants or creations of extraterrestrial intelligence (ETI) who landed on Earth thousands of years ago. An associated idea is that humans evolved independently, but that much of human knowledge, religion, and culture came from extraterrestrial visitors in ancient times, in that ancient astronauts acted as a "mother culture". Some ancient astronaut proponents also believe that travelers from outer space, referred to as "astronauts" (or "spacemen") built many of the structures on Earth (such as Egyptian pyramids and the Moai stone heads of Easter Island) or aided humans in building them.