Authors:

The Visitors reported by contactees, abductees, and other witnesses may, in fact, be a highly advanced amphibian or reptilian culture from an extraterrestrial world, who evolved into the dominant species on their planet millions of years ago and who have interacted in Earth's evolution as explorers, observers, caretakers, and genetic engineers.

Brad Steiger, Sherry Hansen Steiger (2011). “Real Aliens, Space Beings, and Creatures from Other Worlds”, p.67, Visible Ink Press
The Visitors reported by contactees, abductees, and other witnesses may, in fact, be a highly advanced amphibian or reptilian culture from an extraterrestrial world, who evolved into the dominant species on their planet