It is unknown exactly what the small fliers get out of this symbiosis, but it is likely that they receive relatively increased safety. On the Butchertree's side, it grows subterranean roots that resemble these fliers, allowing the "tree" to lure Prismalopes close enough to kill them. They possess a bizarre symbiotic relationship with a currently-unnamed aerial organism, which happens to be the primary food source of the Prismalopes. Dotting the plains of the planet's northern hemisphere, it will kill anything that comes within its attack range with its four branch-daggers. While many species prey on the numerous and fast breeding Prismalope, Butchertrees are the only species to actually lure the Prismalope instead of giving chase although they also feed on the great Skewers as well. Butchertrees are sessile organisms indigenous to Darwin IV.
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