The mantis arms are amazingly strong and have spikes on em so a big one could hold on. I don't think they let go once they get something. The big mantis probably weigh the same or more than a hummer, birds have very light bones. I used to hatch out mantis inthe spring then save a few as pets, watching how they eat, grow, shed, then eat grow shed..till they get wings. The only ones that would make it after fall were the females cause eventually they would mate and we all know what happens then! :evil:
Jody