User blog comment:Blueyhale/The Tyranids; devouring or running from something?/@comment-32788838-20151219012211

I doubt there would be Greenskins in other galaxies considering they are native to the Milky Way due to being creations of the Old Ones, and even if they did, I doubt it was intergalactic Greenskins which chased the Tyranids out from their home since Tyranids do not seem to have a problem with the native Greenskins of the Milky Way. The most probable answer for whether they are intentionally expanding to devour everything or are running from something is both.