A relatively early type of Zoanoid, witnessed by Masaki Murakami when he was in New Guinea (a test ground for Zoanoids).
Casvarius is a bird-like type with hind legs so strong it can kick over a tree. It's front limbs are also elongated, almost as if they were trying to grow into wings.
It was evidently named after the Cassowary, a large flightless bird native to New Guinea, which can kill a human with its kick.