Chinese Praying Mantis (Ootheca/Egg Case)

Scientific Name: Tenodera sinensis

Order & Family: Mantodea; Mantidae

Size: Ootheca: 2–4 cm in diameter; Adults: 7–10 cm in length

Chinese Praying Mantis (Ootheca/Egg Case)

Natural Habitat

Gardens, meadows, and shrubbery; often attached to twigs or stems of plants like hydrangeas in sunny locations.

Diet & Feeding

Carnivorous; as nymphs and adults, they eat insects like flies, moths, and sometimes other mantises.

Behavior Patterns

The female lays the egg mass (ootheca) in late summer or fall, which hardens to protect the eggs through winter. Hundreds of nymphs emerge in the spring.

Risks & Benefits

Highly beneficial to gardens as generalist predators of pests; poses no risk to humans, though it is an introduced species in North America.

Identified on: 3/29/2026