Praying Mantis Egg Case (Ootheca)

Attached to twigs, stems, grass blades, foliage, fences, or walls in gardens, meadows, and fields

Not applicable (egg stage); adult and nymph mantises are carnivorous predators eating insects and small invertebrates

Deposited by female mantises in late summer or autumn as a foamy secretion that hardens into a protective, papery foam structure to insulate hundreds of eggs through winter

Harmless to humans; highly beneficial for gardens and ecosystems as emerging nymphs act as natural biological pest control