Substantially larger than the other one! The praying mantis is carnivorous. It's menu includes: birds, bats, snakes, fish, frogs, insects, and small children who don't listen to their parents* *one of the listed menu items is untrue For the doubters, simply do a Google search for videos. Davis read about a praying mantis capturing a hummingbird. We were doubters until we saw the videos. All of these dudes are non-native to N. America and will aggressively pursue critters much larger than themselves.