Mantis Screamers were giant winged creatures native to the desolate Dinares Sector. Amazingly, they were capable of not only atmospheric flight, but also deep-space flight as well, although the exact method(s) used to accomplish the latter feat is still poorly understood. It is apparent that they could even migrate between stars, presumably while in some kind of larval form, as proof appears as their towering spire aeries are a common sight on a variety of now-lifeless worlds. Apparently they would go through a metamorphosis at some point during their lives, changing entirely into a huge nesting form.