Zetan (Fallout)

Zetans are a species of Grey-like beings who have had many repeated run ins with the inhabitants of the irradiated wasteland which was once known as the United States of America, they been known of Earth and it's inhabitants since at least the 15th Century and have been abducting and experimenting on them ever since.

Biology
The Zetans are seemingly reptilian (or they just have a bad skin care routine ) they