6. The Greys

Zeta Reticuli Greys are also known as Type A Greys. They are the most common aliens reported. Their point of operation is thought to be located within the Zeta Reticuli star system.

Sources:

https://www.outdoors.org/resources/amc-outdoors/history/the-story-of-betty-and-barney-hill/

https://astronomy.com/bonus/zeta

https://abcnews-go-com.cdn.ampproject.org/v/s/abcnews.go.com/amp/Primetime/story?amp_js_v=a6&amp_gsa=1&id=8330290&usqp=mq331AQKKAFQArABIIACAw%3D%3D#aoh=16342217571033&referrer=https%3A%2F%2Fwww.google.com&amp_tf=From%20%251%24s&ampshare=https%3A%2F%2Fabcnews.go.com%2FPrimetime%2Fstory%3Fid%3D8330290

https://allthatsinteresting.com/alien-abductions

https://en.m.wikipedia.org/wiki/Barney_and_Betty_Hill

https://en.m.wikipedia.org/wiki/Grey_alien

https://aliens.fandom.com/wiki/Grey