One of the 5 cockroaches on WAnimals

Insects · Blattodea · Blaberidae

Hissing Cockroach

Gromphadorhina portentosa

Not Evaluated

It has not yet been assessed against the IUCN criteria. See full glossary

The Madagascar giant cockroach, or hissing cockroach, is a blattodean insect of the family Blaberidae. It is one of the largest cockroaches, reaching a length of 5 to 7.6 cm at maturity. They come from the island of Madagascar, off the African coast, where they can be found in rotting logs.

Size

up to 7.5 cm

Lifespan

5 years

Diet

Detritivore

Feeds on dead organic matter as it decomposes.

Activity

Nocturnal

Active mainly at night.

Social structure

Colony

Lives in large concentrations, often for breeding reasons.

Sighting difficulty

Unknown

Fun facts

  • reproducciónUnlike most insects it has no working wings, and it is one of the few cockroaches that bears live young rather than laying an external ootheca.
  • comunicaciónIt can make an audible hiss by forcing air out through a specialised pair of spiracles on its abdomen, an unusual mechanism among insects.
  • It hisses in a way unique among invertebrates: it does not rub body parts together but forces air out through a pair of modified abdominal spiracles. It is virtually the only insect that makes sound by breathing.
  • Four distinct hisses have been identified: one for fights between males, two for courtship and one alarm hiss, long and snake-like, that startles predators.
  • The female is ovoviviparous: she incubates the eggs inside her body and gives birth to live young, which is rare among insects.
  • It has no wings, but it has pads and hooks on its feet that let it climb glass.
  • The males carry two prominent bumps behind the head that people mistake for eyes; they use them to ram each other in fights over territory.

Life cycle & biology

Skeleton type
Invertebrate - chitin exoskeleton (insect)
Habitat & environment
The floor of Madagascar's lowland rainforest, among dry leaf litter and rotting logs

Sources consulted: https://es.wikipedia.org/wiki/Gromphadorhina_portentosa

Where to watch it

Parques y spots de buceo donde se ha documentado esta especie — se muestran 10 de 12 documentados.

Related species

Other species in the catalogue with the most in common with Hissing Cockroach — same habitat, park, country, tags or family.

Keep exploring

Based on what we already know about hissing cockroach.

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