First documented in the Betty and Barney Hill abduction case of 1961, though similar beings appeared in earlier science fiction. Greys are the most commonly reported alien type, described as 3-4 feet tall with grey skin, oversized heads, large black almond-shaped eyes, and small slit mouths. They allegedly hail from the Zeta Reticuli star system, based on a star map Betty Hill reproduced under hypnosis. Associated with abduction phenomena, medical examinations, and reproductive experiments. Featured prominently in 'Close Encounters of the Third Kind' (1977), 'The X-Files' (1993-2018), and countless other media. The archetypal 'alien' in modern culture.
A variant of the standard Grey, reported as 5-7 feet tall and often described as supervisors or leaders directing smaller Greys during abductions. First distinguished in 1980s abduction research, particularly through the work of Budd Hopkins and David Jacobs. They display more pronounced features and are sometimes described as more emotionally expressive. Occasionally reported wearing robes or cloaks. Their role appears hierarchical, suggesting a complex Grey social structure.
First appeared in the 1950s contactee movement, most famously through George Adamski's 1952 Desert Center encounter with 'Orthon from Venus.' Described as tall (6-7 feet), beautiful humanoids with blonde hair, blue eyes, and pale skin, resembling idealised Scandinavians. Associated with messages of peace, spiritual evolution, and warnings about nuclear weapons. Swiss contactee Billy Meier claimed ongoing contact with Pleiadians since 1975, particularly 'Semjase.' Their benevolent nature contrasts with the clinical Greys.
First appeared in Robert E. Howard's 1929 fiction and entered ufology through contactee accounts in the 1960s. Popularised globally by David Icke from 1999 onwards. Described as 6-8 feet tall humanoid reptiles with green or brown scales, vertical slit pupils, and muscular builds. Allegedly originate from the Draco constellation and are associated with underground bases, shape-shifting abilities, and control of human elites. The Lacerta Files (1999) purport to be interviews with a female Reptilian. Feature in 'V' (1983) and 'They Live' (1988).
Reported in abduction accounts from the 1970s onwards, often working alongside Greys. Described as 6-8 feet tall praying mantis-like beings with triangular heads, large compound eyes, and thin limbs. Often depicted as overseers or spiritual guides during abduction experiences, displaying apparent empathy. Some experiencers describe them as ancient beings predating other species. Associated with healing, consciousness expansion, and deep psychological examination.
Documented by Charles Hall, a former US Air Force weather observer, who claimed encounters at Nellis Air Force Base in Nevada during the 1960s. Described as 5-7 feet tall with chalk-white skin, platinum blonde hair, large blue eyes, and extremely thin frames. Hall described them as having a fragile appearance and wearing specialised suits in Earth's atmosphere. Allegedly have an agreement with the US government and maintain a base near Nellis. Published in Hall's 'Millennial Hospitality' book series.
Emerged in modern UFO discourse through Corey Goode's 2015 Cosmic Disclosure testimony. Described as 8-foot-tall humanoid birds with blue or indigo feathers, beak-like faces, and advanced telepathic abilities. Associated with the 'Sphere Being Alliance' and alleged Secret Space Program disclosures. Described as spiritually evolved beings promoting the 'Law of One' philosophy. Their emergence coincides with increased interest in 'ascension' narratives within the UFO community.
First appeared in Edgar Cayce's channelled readings in the 1930s-40s, with Arcturus described as a gateway to other dimensions. Became prominent through Norma Milanovich's 1990 book 'We, the Arcturians.' Described as tall, thin beings with large eyes and blue or green skin, originating from the Arcturus star system, 37 light-years from Earth. Associated with healing, spiritual advancement, and protection of Earth. Often depicted as among the most spiritually evolved extraterrestrial races.
Associated with the Dogon tribe's astronomical knowledge and Robert Temple's 1976 book 'The Sirius Mystery.' Described as humanoid beings from the Sirius star system, with both human-like and aquatic variants reported. Some accounts link them to ancient Egypt and the construction of pyramids. The Dogon's knowledge of Sirius B before modern astronomy discovered it remains controversial. Sirians are often portrayed as ancient benefactors of human civilisation.
Emerged through contactee Alex Collier's 1990s testimonies. Described as tall, blue-skinned humanoids from the Andromeda galaxy. Collier claimed they are highly advanced beings concerned with humanity's spiritual development and Earth's role in galactic politics. Associated with the 'Andromeda Council' and warnings about Reptilian influence. Their alleged distance (2.5 million light-years) raises questions about interstellar travel.
Featured in various channelling traditions as the original humanoid species in our galaxy. Described as cat-like or lion-like humanoids, sometimes called 'Urmah' or 'Feline Aliens.' Allegedly seeded many humanoid races across the galaxy before wars with Reptilians dispersed them. Associated with the Vega and Lyra star systems. Their mythology positions them as progenitors of Pleiadians, Sirians, and Earth humans.
Popular in 1950s contactee accounts, most notably through George Adamski and Howard Menger. Described as beautiful, human-like beings claiming Venus as their home. Contactees described receiving spiritual teachings and warnings about nuclear weapons. As science revealed Venus's hostile surface conditions, accounts shifted to describe Venusians living in another dimension or underground. Valiant Thor, an alleged Venusian, supposedly visited the Pentagon in 1957-1960.
Described in the alleged Project Serpo documents released in 2005, claiming a 1960s exchange program between the US government and beings from Zeta Reticuli. Ebens are described as short, grey-skinned humanoids similar to Greys but with more individual variation. The Serpo narrative claims 12 military personnel travelled to their planet for 13 years. The story remains highly controversial and is considered by many to be an elaborate hoax or disinformation.
Derived from Sumerian mythology and popularised by Zecharia Sitchin's 1976 book 'The Twelfth Planet.' Described as tall humanoid beings from the planet Nibiru who allegedly created humanity through genetic engineering to mine gold. Associated with ancient astronaut theories and interpretations of Sumerian texts. Sitchin's translations are rejected by mainstream Sumerologists, but the concept remains influential in alternative history circles.
Reported extensively in abduction literature from the 1980s onwards, particularly through researchers Budd Hopkins, David Jacobs, and John Mack. Described as beings combining human and Grey characteristics, allegedly created through reproductive experiments. Descriptions range from almost human-appearing to distinctly alien. The 'hybrid program' is a central theme in modern abduction narratives, with some experiencers claiming to have hybrid children.