Blaberus craniifer
The death's head cockroach — large, winged, and decorated with a skull-like marking you can't unsee.
About Blaberus craniifer
The death's head cockroach is a large Blaberid species from Central America and the Caribbean. Its common name comes from the dark, skull-shaped marking on the pronotum — the shield-like plate behind the head. Adults have fully developed wings and can glide short distances, though sustained flight is rare.
Unlike the spiracle-based hissing of Gromphadorhina, B. craniifer produces sound through stridulation — rubbing body parts together. The resulting hiss is quieter and less dramatic, but still audible when the animal is handled or disturbed. As a tropical species, they cannot survive without supplemental heat and pose no risk of home infestation.
Enclosure
A 40×30×30 cm enclosure with a secure, ventilated lid suits a group of 5–10 adults. Adults have wings and can glide, so a tight-fitting lid is essential:
- Coco coir or organic topsoil substrate, 5–8 cm deep
- Egg carton, cork bark, or cardboard tubes for hiding spots
- A shallow water dish with cotton wool or water gel crystals
- Mist lightly every 1–2 days to maintain humidity without waterlogging
They appreciate a warm, moderately humid environment. A heat mat on one side of the enclosure creates a useful temperature gradient.
Feeding
Death's head cockroaches are omnivorous scavengers with healthy appetites:
- Fresh fruit and veg: banana, apple, carrot, sweet potato, dark leafy greens
- Protein: fish flakes, cat kibble, or dried shrimp — needed for healthy moults and breeding
- Dry staples: rolled oats, bran, wholemeal bread
- Calcium: cuttlebone or crushed eggshell, especially important for gravid females
They eat a lot relative to their size. Keep dry food available at all times and offer fresh food every 2–3 days. Remove anything mouldy promptly.
Breeding & colony life
B. craniifer is ovoviviparous — the female retains the ootheca internally and gives birth to live nymphs. A single brood produces 20–40 nymphs. Development from nymph to adult takes 4–6 months at warm temperatures, with several moults along the way (incomplete metamorphosis — no pupal stage).
These are social animals and thrive in groups. Males may occasionally jostle over territory, which is normal. Colonies grow quickly under good conditions, so plan for expansion or be prepared to rehome surplus animals.