Micke Grove Zoo

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Madagascar Giant Hissing Cockroach

Gromphadorhina portentosa

Habitat: Diverse habitats

Range: Madagascar

Natural Diet: Primarily vegetable matter

Status in the Wild: Common (Least Concern)


Fun Animal Facts

These giant cockroaches can grow up to 3 inches in length. Unlike other cockroaches, they insects do not have wings. They hiss as a defensive reaction to distract predators. The roaches are able to forcefully pass air through respiratory openings or spiracles that are located along their abdomen. Only adult roaches are able to hiss. Males also use hissing to compete with other males and to attract females.


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Female hissing roaches have slender antennae in comparison to males [Photo courtesy Wikimedia Commons]

Distributional range