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.

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