Praying Mantis Egg Case

Scientific Name: Ootheca (produced by Mantodea)

Order & Family: Order: Mantodea; Family: Mantidae

Size: 1 to 2 inches (25 to 50 mm) in length.

Praying Mantis Egg Case

Natural Habitat

Found attached to twigs, branches, stems, or man-made structures like fences and siding in gardens, meadows, and forests.

Diet & Feeding

The egg case itself is not an organism. The emerging nymphs (babies) are carnivorous, eating small insects like aphids and gnats.

Behavior Patterns

Nymphs hatch in the spring, emerging simultaneously from the case. The structure is made of a frothy substance that hardens to protect 50-200 eggs from cold and predators through winter.

Risks & Benefits

Extremely beneficial to ecosystems and gardens. Mantises are natural pest controllers that eat a variety of nuisance insects.

Identified on: 2/16/2026