Gromphadorhina oblongonota
Gromphadorhina • Blaberidae
The largest of the commonly kept hissing cockroaches — bigger and darker than the Madagascar hisser, with males sporting exaggerated 'triceratops' pronotal horns. Hardy, docile, and slow to mature (8-12 months). A surface/bark dweller and a capable glass-climber, so use a secure, vented lid. Keep on barely-moist peat and rotted compost with plenty of stacked bark for shelter; 75-90°F breeds fastest. Feeds on roach chow plus organic banana, orange, and zucchini; moisture from produce/substrate, not a water dish. Hisses by forcing air through its spiracles. Harmless. Lifespan 2-5 yr.
Temperature
75-90°F
Humidity
60-80%
Prey size: omnivore — roach chow/dry dog food, fruit, veg, occasional protein
Type
terrestrial
Adult Size
up to ~3 in (~75 mm)
Growth Rate
medium
Native Region
Southern Madagascar
Temperament
docile, hardy; hisses; climbs glass
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