Once hatched, praying mantis begin feeding on small insects, such as aphids. Later on, they’ll continue advancing up to larger and larger prey. By summer’s end, praying mantis can reach several inches in length. In the fall, females produce more eggs, deposited in a frothy secretion that hardens to protect the eggs from predators and severe winter climates. Egg cases are attached to twigs, leaves, fences, etc. Several egg cases may be laid before cold winter finally sets in. This new generation of praying mantis will hatch when warm weather returns, to repeat the process.