Saucer travelers, for short

• Some warriors in "War of the Worlds"
• Big-headed sorts, for short
• They're typically known to have big heads
• Visitors from Neptune: Abbr
• ''Independence Day'' assailants, for short
• Saucer users, in brief
• "Close Encounters" beings
• "V" visitors, e.g
• Little green men, for short

Wikipedia Word definitions in Wikipedia
ETS is an abbreviation of: