While the Koronus Expanse has only seen very isolated encounters with this being, reports indicate a Thornmaw seems to wait with unnerving stillness as it readies itself for attack. With the mouth is closed and the talons gone limp, while extremely distinctive its appearance is still not so unnatural that the true danger is apparent. Indeed, given the incredible nature of many of the other denizens of the Expanse, on two occasions it was taken for some sort of alien plant life whist it was resting on native foliage. While it can move with speed when pursuing prey, it seems to conserve this mobility until necessary.