Reminds me of the old episode from 1950 on a radio show “Dimension X.” The story was called “The Martian Death March” written by Ernest Kinoy. It was about a man, in 2027 recalling his boyhood with his father on Mars back in 1997 where he witnessed an old man leading Martians on a march from their reservations to another place to live. The Martians were tall and skinny and were called “Spiders.” It sort of remind me of the civil rights marches that would occur later in that decade and onward into the 1960’s
Reminds me of a "Space 1999" show that had a "space spider" attaching itself to their viewing window.
I think Earth's spiders are too weird to have ever evolved on Earth, anyway. They're likely from Mars.
;)