D
Species Profile

Death’s Head Cockroach

Blaberus craniifer

The roach with a skull on its shield
Goskova Tatiana/Shutterstock.com

Death’s Head Cockroach Distribution

Click a location to explore more animals from that region

Loading map...
The True Death's Head Cockroach

At a Glance

Wild Species
Diet Omnivore
Activity Nocturnal+
Lifespan 1.1 years
Weight 0.008 lbs
Status Not Evaluated
Did You Know?

Adults are typically about 5-6 cm long, making it a "large" hobby roach in the genus Blaberus.

Scientific Classification

A large blaberid cockroach commonly kept as a pet/feeder species, notable for a skull-like pattern on the pronotum (the “death’s-head” marking).

Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Blattodea
Family
Blaberidae
Genus
Blaberus
Species
craniifer

Distinguishing Features

  • Large, robust blaberid cockroach with long wings (adults)
  • Pronotum bears a contrasting, skull-like marking that inspires the common name
  • Typical blaberid build: broad pronotum shielding the head, spiny legs, fast-running behavior

Physical Measurements

Length
2 in (2 in – 3 in)
Weight
0 lbs (0 lbs – 0 lbs)

Appearance

Primary Colors
Secondary Colors
Skin Type Hard, sclerotized chitinous exoskeleton; pronotum smooth and shield-like; tegmina (leathery forewings) overlay membranous hindwings. Surface often slightly glossy; newly molted individuals appear lighter/softer until cuticle hardens.
Distinctive Features
  • Adult size: a large blaberid roach; commonly reported adult body length ~4.5-5.5 cm (often cited in hobby and museum/ID resources for Blaberus craniifer; confirm against locality-specific series when precision is required).
  • Pronotum bears the signature skull-like pattern (the defining appearance trait in this species' common name).
  • Body form robust and dorsoventrally flattened; head mostly concealed under the pronotum when viewed from above (typical of Blattodea).
  • Long filiform antennae; legs with prominent tibial spines; adapted for climbing and rapid running.
  • Winged as adults: tegmina cover most of the abdomen; flight is limited/rare in typical captive conditions despite full wings (a common Blaberus trait).
  • Nymphs lack wings, appear more uniformly dark brown, and develop the adult pronotal contrast as they mature through molts (general blaberid ontogeny; see Bell, Roth & Nalepa 2007 for cockroach development).
  • In captivity, Death's-head cockroaches (Blaberus craniifer) show stronger color at warm temperatures (~26–30°C) and good humidity; dehydration makes them dull and wrinkled between abdominal segments.

Sexual Dimorphism

Sexual dimorphism is present but subtle: males tend to be slimmer with proportionally longer wings; females are broader with a more expanded abdomen. This pattern matches common Blaberus spp. morphology (e.g., Bell, Roth & Nalepa 2007).

  • Typically slimmer body profile with a narrower abdomen.
  • Wings (tegmina) often extend slightly farther relative to the abdomen; overall looks more elongate.
  • Terminal abdominal segments appear more tapered.
  • Typically broader, heavier-bodied abdomen (especially when gravid).
  • Wings may appear slightly shorter relative to abdomen; overall looks more robust.
  • Abdominal tip appears less tapered; abdomen often visibly wider in the posterior half.

Did You Know?

Adults are typically about 5-6 cm long, making it a "large" hobby roach in the genus Blaberus.

The famous "death's-head" look is a dark, skull-like pattern on the pronotum (the shield behind the head); it's strongest in some adults and can vary by individual and molt.

Like many Blaberidae, it is ovoviviparous: the female retains the ootheca internally and gives birth to live nymphs rather than dropping an egg case early.

Adults are fully winged; they're not strong fliers, but they can flutter-glide and use wings in startle displays.

A well-kept colony can reproduce steadily in warm, humid conditions-one reason it's commonly used as a feeder insect for reptiles and amphibians.

They are mostly nocturnal: during the day they wedge into tight, dark shelters and emerge at night to forage.

Their "skull" marking has made them a staple species in classrooms, museums, and outreach collections for insect anatomy and metamorphosis lessons.

Unique Adaptations

  • Pronotum "death's-head" pattern: a conspicuous, skull-like marking on the pronotal shield that gives the species its common name and may function in disruptive camouflage/visual confusion when glimpsed by predators.
  • Ovoviviparity (live birth): the ootheca is retained and embryos develop internally, helping protect developing young from desiccation and predation in variable tropical microclimates.
  • Clinging/climbing toolkit: adhesive pads (pulvilli) and claws on the tarsi allow secure traction on bark, rough surfaces, and enclosure furnishings.
  • Cellulose-based diet support: like many cockroaches, it relies on gut microbes to help extract nutrients from fibrous, decaying plant matter-key to its role as a forest-floor recycler.
  • Thick, flexible exoskeleton: provides protection and reduces water loss, supporting life in warm habitats where microclimate humidity can fluctuate.

Interesting Behaviors

  • Nocturnal sheltering: nymphs and adults strongly prefer tight hides (cork bark, egg flats, crevices) and will stack or cluster to conserve moisture and reduce predation risk.
  • Startle response: when disturbed, adults may flash or flutter their wings and sprint; this sudden movement can deter predators long enough to escape.
  • Scavenger-feeding: they readily consume decaying plant material and protein-rich scraps; in captivity they often show strong food preferences (fruit/veg first, then dry chow).
  • Humidity-seeking: they actively choose more humid microhabitats for resting and molting; poor humidity commonly leads to incomplete molts in captive colonies.
  • Social tolerance: they are generally colony-friendly, with low overt aggression compared with many other large insects; crowding mainly increases stress via competition for hides/food.

Cultural Significance

Death's-head cockroach (Blaberus craniifer) is a hardy, large, calm blaberid with a skull-like pronotum. Popular for education, pets, and feeders. Needs warm (~27–30 °C), fairly humid homes with many hides to molt and breed.

Myths & Legends

Hobby keepers call Blaberus craniifer the "death's-head roach" because the pronotum marking looks like a skull, like the Western "death's-head" symbol in art and decoration, which stands for death and warning.

In many cultures, cockroaches are home signs—appearing before guests, predicting weather changes, or showing survival. Though not specific to Blaberus craniifer, its skull-like mark has boosted gothic and novelty stories.

In cabinets of curiosities, large, eye-catching roaches (including Blaberus craniifer) have long been shown in natural history displays; their skull-like mark led collectors to give dark nicknames and stories.

Conservation Status

NE Not Evaluated

Has not yet been evaluated against the criteria.

Population Unknown

Life Cycle

Birth 25 nymphs
Lifespan 1 year

Lifespan

In the Wild
0.8–1.5 years
In Captivity
1–2 years

Reproduction

Mating System Polygynandry
Social Structure Aggregation Group
Breeding Pattern Transient
Fertilization Internal Fertilization
Birth Type Internal_fertilization

Death's-head cockroach (Blaberus craniifer) is gregarious, forming mixed-sex groups but no pair bonds. It is polygynandrous: both sexes mate multiple times in groups. Males offer tergal gland secretions; females feed, spermatophore transfer, sperm storage; ovoviviparous; no parental care.

Behavior & Ecology

Social Colony Group: 30
Activity Nocturnal, Crepuscular
Diet Omnivore Overripe fruit (commonly taken readily in captivity; species-specific preference rankings are not well quantified in the scientific literature).

Temperament

Gregarious (strong tendency to aggregate in harborage)
Generally non-aggressive toward conspecifics; not territorial
Disturbance response dominated by rapid running, seeking cover; may freeze briefly when exposed
Defensive behavior may include wing-raising and emission of odoriferous defensive chemicals typical of many blaberid cockroaches (reported broadly for Blattodea/Blaberidae; species-specific chemical profile data for B. craniifer not well standardized in primary literature)

Communication

no stereotyped vocalizations documented for Blaberus craniifer; sound is typically incidental (rustling/wing movement) rather than used as a signal
chemical communication: sex pheromones Female-attractant cues typical of Blattodea) and contact chemoreception via antennae/palps; Blaberus courtship commonly involves antennation and close-range chemical assessment (general Blaberus/Blattodea biology summarized in Bell, Roth & Nalepa 2007
aggregation cues: attraction to conspecific-conditioned shelters/feces and cuticular hydrocarbons; promotes colony formation and retention in refuges Well documented across cockroaches; genus-level evidence stronger than species-specific B. craniifer datasets
tactile signaling: antennal tapping/antennation mediates spacing, recognition, and courtship interactions at close range
substrate-borne vibration: disturbance and courtship can involve body movements transmitted through the substrate Reported in various cockroaches; specific experimental confirmation in B. craniifer is limited

Habitat

Biomes:
Tropical Rainforest Tropical Dry Forest
Terrain:
Coastal Island Plains Valley Riverine
Elevation: Up to 3280 ft 10 in

Ecological Role

Omnivorous detritivore/scavenger contributing to decomposition in tropical/subtropical microhabitats (leaf litter/rotting wood) and serving as prey for insectivorous vertebrates and invertebrates.

breakdown of plant detritus and acceleration of decomposition nutrient mineralization and recycling via frass production microbial dispersal associated with feeding on decaying substrates food-web support as prey for predators (e.g., reptiles, amphibians, birds, small mammals, predatory arthropods)

Diet Details

Main Prey:
Carrion Dead insects and other invertebrates animal-derived refuse
Other Foods:
leaf litter and plant detritus Fruit Rotting wood Fungi Starchy plant scraps

Human Interaction

Domestication Status

Semi domesticated

Blaberus craniifer (death's-head cockroach) is a wild Neotropical blaberid and is not a domesticated species, but it is commonly maintained and bred in captivity for the pet and feeder-insect trade and for educational colonies. Like other Blaberidae, it is ovoviviparous (the ootheca is retained internally until nymphs are born). The species was originally described by Hermann Burmeister in 1838.

Danger Level

Low
  • Allergen exposure: cockroach frass/shed skins can contribute to allergic sensitization/asthma in susceptible people (well documented for cockroaches broadly, especially peridomestic species).
  • Minor mechanical injury: can scratch with spines; rarely may nibble soft food residues-bites to intact human skin are uncommon and typically trivial.
  • Husbandry-associated hygiene risk: poor sanitation can lead to mold/mite blooms and unpleasant odors; risk is managed with regular cleaning and ventilation.
  • Biosecurity/escape risk: accidental release can create nuisance infestations in warm indoor environments, though B. craniifer is primarily a tropical species and persistence outdoors depends on climate.

As a Pet

Suitable as Pet

Legality: Generally legal to keep in many jurisdictions when maintained in secure captivity, but live-cockroach transport/possession can be restricted by local invasive-species rules, agriculture regulations, or state/provincial statutes. Always verify local law before purchase and especially before shipping across borders.

Care Level: Easy

Purchase Cost: $3 - $15
Lifetime Cost: $40 - $250

Economic Value

Uses:
Pet trade (display insect) Feeder insect production (reptiles/amphibians/invertebrates) Education/outreach (classroom colonies) Research/teaching colonies (general insect biology)
Products:
  • live nymphs/adults sold individually or as starter colonies
  • feeder roaches (various sizes by instar)
  • husbandry supplies market demand (tubs, egg-crate flats, heat sources, diets)

Relationships

Related Species 7

Discoid cockroach Blaberus discoidalis Shared Genus
Giant cockroach Blaberus giganteus Shared Genus
Death's-head cockroach
Death's-head cockroach Blaberus Shared Genus
Madagascar hissing cockroach
Madagascar hissing cockroach Gromphadorhina portentosa Shared Family
Orange-head cockroach Eublaberus posticus Shared Family
Green banana cockroach
Green banana cockroach Panchlora nivea Shared Family
Peppered cockroach Archimandrita tesselata Shared Family

Ecological Equivalents 4

Animals that fill a similar ecological role in their ecosystem

Discoid cockroach Blaberus discoidalis Very similar ecology and husbandry niche: a large, nocturnal, detritivorous/omnivorous tropical blaberid that hides in crevices by day and feeds on decaying plant material and other organic matter at night. Commonly used as a feeder and as a pet roach.
Giant cockroach Blaberus giganteus Occupies a similar forest-floor and rotting-wood detritivore niche, often associated with caves and hollow logs; exhibits comparable nocturnal behavior and relies on humid microhabitats. Also kept in captivity as a display/pet roach.
Madagascar hissing cockroach
Madagascar hissing cockroach Gromphadorhina portentosa Not closely related at the genus level but strongly niche-convergent in captivity and in the wild: a large-bodied blaberid detritivore/omnivore, primarily nocturnal, that favors humid shelters and feeds on fallen fruit and leaf litter; frequently compared or paired in pet and feeder contexts.
Orange-head cockroach Eublaberus posticus Shares functional role as a large, burrow- and hide-oriented tropical detritivore/omnivore commonly used as feeder stock; has similar nutritional ecology (leaf litter, fruits, carrion) and a tendency to thrive in warm, humid enclosures.

Death’s Head Cockroach Summary

“This cockroach is often kept as a pet.”

The Death’s Head Cockroach is a large winged insect which is native to Mexico , the West Indies, and Central America. It has also been introduced into Florida . There is a small black patch on their head that looks like a “Death’s head.” Although they have black wings, they are not considered a flying cockroach species, though they do use the wings to glide from higher places down to lower ones. Even though cockroaches are usually considered pests, the Death’s Head Cockroach is often kept as a pet, either alone or with a few others in a group.

Death’s Head Cockroach Facts

  • Death’s Head Cockroaches can grow over two inches in length.
  • A True Death’s Head Cockroach may sometimes be confused with the Discoid Cockroach (False Death’s Head Cockroach), which has a much simpler black patch on its head and much paler wings.
  • Death’s Head Cockroaches have a black, face or skull shaped marking on their heads, from which they get their unusual name.
  • Death’s Head Cockroaches are the largest cockroaches found in North America.
  • A Death’s Head Cockroach can live up to 1 year.

Death’s Head Cockroach Species, Types, and Scientific Name

The Death’s Head Cockroach’s scientific name is Blaberus craniifer and though there are many cockroach species, there is only one species considered a True Death’s Head Cockroach. This type of cockroach has a very distinctive mark from which it gets its name. Its mark also informs its scientific name, since Craniifer is Latin for “Carrier of the head.”

Appearance: How To Identify Death’s Head Cockroach

A Death’s Head Cockroach is approximately two inches long and dark brown bordering on black. Its body is in the shape of a long oval. On the paler brown pronotum, or the head portion of the exoskeleton, the Death’s Head Cockroach has a black marking with reddish orange spots which resembles a skull or perhaps a jack-o-lantern. They can be confused with the Discoid Cockroach (Blaberus discoidalis), also known as the False Death’s Head Cockroach because of their similar appearance. The reason for this is that the Discoid also has a black patch on its head, but it is only a patch and it does not have the additional red marks that give the black patch on a Death’s Head Cockroach the appearance of a face. They also do not have the black wings of a True Death’s Head Cockroach.

Habitat: Where to Find Death’s Head Cockroach

Death’s Head Cockroaches primarily live in Central America and in Florida. Their habitat is woodlands and forests, where they can live under leaves and debris and in old decaying logs. When Food is scarce, they may even eat the rotting wood for sustenance until they find better food. They prefer warm, humid climates, and when they are cared for as pets, their enclosure needs to be hot and damp.

Diet: What Do Death’s Head Cockroach Eat?

Death’s Head Cockroaches are omnivores whose diet consists mainly of vegetation, carrion, smaller insects, and sometimes wood or even feces. They can consume up to half their own weight in food at a time. When some cares for Death’s Head Cockroaches as pets, these roaches will happily eat pet food, moistened cereal, and a variety of fruits and vegetables. In the wild, Death’s Head Cockroaches are prey to anything that consumes insects, such as birds, reptiles, spiders, and amphibians.

View all 450 animals that start with D

Sources

  1. Death's head cockroach Wiki
  2. How to Identify the Death's Head Cockroach
  3. Death’s Head Cockroaches
  4. What Do Death Head Cockroaches Look Like?
  5. True Death’s Head Cockroach
  6. Death’s Head Cockroach Blaberus craniifer
  7. Death’s Head Cockroach Care
  8. Death’s Head Cockroach Care and Feeding
Austin S.

About the Author

Austin S.

Growing up in rural New England on a small scale farm gave me a lifelong passion for animals. I love learning about new wild animal species, habitats, animal evolutions, dogs, cats, and more. I've always been surrounded by pets and believe the best dog and best cat products are important to keeping our animals happy and healthy. It's my mission to help you learn more about wild animals, and how to care for your pets better with carefully reviewed products.
Connect:

Thank you for reading! Have some feedback for us?


Death’s Head Cockroach FAQs (Frequently Asked Questions)

The Death’s Head Cockroach is a species of large cockroach with black wings and a black “Death’s Head” spot on its thorax.