Dubia Roach (Blaptica dubia) Care & Breeding Guide
The Dubia Roach (Blaptica dubia) is a medium-sized cockroach native to South America and widely maintained as a feeder insect for reptiles, amphibians, arachnids and other insectivorous animals.
Dubia Roaches are popular because they are nutritious, relatively slow-moving, easy to contain and straightforward to breed. Unlike several common pest cockroaches, they are poor climbers on smooth surfaces and do not reproduce well at normal cool household temperatures.
A healthy colony can provide a reliable supply of feeder insects while allowing the keeper to control diet, hygiene and size.
Quick Facts
Scientific name: Blaptica dubia
Common names: Dubia Roach, Argentinian Wood Roach, Orange-Spotted Roach
Family: Blaberidae
Origin: South America
Adult size: Approximately 4–5 cm
Lifestyle: Terrestrial, nocturnal
Experience level: Beginner
Social behaviour: Colonial
Temperature for strong breeding: Approximately 27–30°C
Lighting: No specialist lighting required
Diet: Omnivorous
Reproduction: Females produce live nymphs after retaining the egg case internally
Primary captive use: Feeder insect and colony species
Natural Distribution
Blaptica dubia originates from southern South America.
Records include parts of:
- Argentina
- Brazil
- Uruguay
- Paraguay and surrounding regions
They naturally occupy warm sheltered environments with access to decomposing plant material and other organic foods.
Appearance
Dubia Roaches are sexually dimorphic.
Adult Males
Adult males have:
- fully developed wings
- a relatively narrow body
- darker colouration
- long antennae
Their wings cover most of the abdomen.
Adult Females
Adult females are:
- broader-bodied
- heavier
- equipped with only short wing pads
- typically darker and more robust
Nymphs
Nymphs are:
- wingless
- dark brown to black
- oval-shaped
- variable in size depending on age
This size range makes a colony useful for feeding animals requiring different prey sizes.
Adult Size
Adults generally reach approximately:
4–5 cm
Males tend to appear longer because of their wings, while females are usually broader and heavier.
Lifespan
Under favourable captive conditions, Dubia Roaches can live for approximately:
1–2 years
Temperature, diet, sex and reproductive activity all influence longevity.
Behaviour
Dubia Roaches are primarily nocturnal.
During daylight they tend to remain hidden within:
- egg flats
- cardboard shelters
- bark
- other dark structures
They become considerably more active after dark or when food is introduced.
Can Dubia Roaches Climb?
Nymphs and adults generally cannot climb clean, smooth glass or plastic surfaces effectively.
This is one of the reasons they are popular feeder insects.
However, they can climb:
- textured plastic
- silicone
- rough wood
- cardboard
- dirty surfaces
- objects touching the enclosure walls
The enclosure should still have a secure lid.
Can Dubia Roaches Fly?
Adult males possess full wings, but sustained flight is uncommon.
They may flutter or glide under certain conditions.
Females cannot fly.
A secure colony lid is still recommended.
Enclosure
Dubia Roaches can be maintained in:
- plastic storage tubs
- ventilated insect breeding bins
- large smooth-sided containers
The exact enclosure size depends on colony size.
For a breeding colony, a container of approximately:
40–60 litres
is a useful starting point.
Large colonies require more space and ventilation.
Ventilation
Good ventilation is essential.
Provide ventilation in the:
- lid
- upper sides
- or both
Fine mesh can prevent smaller nymphs escaping.
Insufficient airflow can lead to:
- excessive condensation
- mould
- bad odours
- mite problems
- bacterial growth
A healthy Dubia colony should not produce an overpowering smell.
Internal Furnishing
Egg flats or similar cardboard structures are commonly used.
Place them vertically where possible.
Vertical stacking:
- increases usable surface area
- allows frass to fall downward
- improves airflow
- makes harvesting easier
Avoid packing the enclosure so tightly that air cannot circulate.
Substrate
A loose substrate is generally not required for feeder colonies.
Bare-bottom tubs are commonly used because they are easier to clean and inspect.
Frass will naturally accumulate on the floor.
Small quantities are not necessarily harmful, but excessive buildup should be removed periodically.
Temperature
Temperature has a major effect on growth and reproduction.
For a productive breeding colony, aim for approximately:
27–30°C
Colonies kept cooler may survive but reproduce and grow substantially more slowly.
Normal room temperature is often sufficient for holding feeder roaches temporarily but may not support strong breeding.
Heating
Where additional heating is necessary, use a controlled external heat source.
Suitable options can include:
- heating the room
- thermostatically controlled heat cable
- thermostatically controlled heat mat attached externally to part of the enclosure
Never allow the entire colony to become excessively hot.
Provide a gradient so roaches can move away from the warmest area.
All heating equipment should be controlled by a reliable thermostat.
Overheating
Prolonged excessive heat can result in:
- dehydration
- reproductive decline
- mortality
- food spoilage
Small plastic tubs can heat rapidly.
Temperature should be measured rather than estimated.
Humidity
Dubia Roaches do not require a constantly wet enclosure.
Moderate ambient humidity combined with moisture-rich foods is generally sufficient.
Avoid:
- saturated substrate
- persistent condensation
- constantly wet cardboard
Excess moisture increases mould and mite problems.
Water
Hydration can be provided primarily through fresh vegetables.
Suitable moisture-rich foods include:
- carrot
- courgette
- squash
- leafy vegetables
If additional water is required, use a method that does not create a drowning hazard for small nymphs.
Avoid deep open water containers.
Diet
Dubia Roaches are omnivorous.
A varied diet produces healthier feeders.
Their diet should include a combination of:
- plant material
- suitable dry foods
- vegetables
- modest protein sources
Dry Foods
Suitable dry staples can include:
- quality roach diets
- whole-grain cereals without excessive sugar
- bran
- oats
- appropriately formulated insect diets
Dry food should remain free from mould.
Replace it if it becomes damp or spoiled.
Vegetables
Useful vegetables include:
- carrot
- squash
- sweet potato
- courgette
- leafy greens
Offer quantities the colony can consume within a reasonable period.
Remove mouldy leftovers.
Fruit
Fruit can be offered in moderation.
Suitable examples include:
- apple
- pear
- berries
Fruit is generally higher in sugar and moisture than vegetables and can spoil rapidly.
It should not dominate the diet.
Protein
A modest protein source can support colony growth.
Suitable options include:
- specialised roach food
- quality fish food in small quantities
- insect-based feeds
Avoid excessive protein.
Very high-protein diets are unnecessary and can produce poorer feeder balance.
Gut Loading
When Dubia Roaches are intended as feeders, diet immediately before feeding them to reptiles or amphibians is particularly important.
Gut loading means feeding the insects a nutritious diet before they are offered as prey.
For approximately:
24–48 hours before feeding
offer nutrient-rich foods appropriate to the animal that will consume them.
This improves the nutritional value of the feeder’s digestive contents.
Calcium
Dubia Roaches themselves should receive a balanced diet.
For many reptiles and amphibians, feeders still need to be dusted with calcium and other supplements according to the requirements of the species being fed.
Gut loading does not automatically replace appropriate supplementation.
Foods to Avoid
Avoid feeding:
- mouldy food
- heavily processed salty foods
- pesticide-contaminated produce
- spoiled meat
- chemically treated plant matter
Wash fresh produce where appropriate.
Feeding Frequency
Dry food can remain available continuously if kept clean and dry.
Fresh vegetables can generally be offered:
several times per week
or more frequently in large colonies.
Remove decomposing leftovers before they cause mould or excessive moisture.
Colony Structure
A productive colony requires both:
- mature males
- mature females
A commonly used breeding ratio is approximately:
1 adult male to 3–5 adult females
Excessive numbers of males can increase competition and unnecessary disturbance.
Reproduction
Dubia Roaches reproduce differently from egg-laying feeder insects such as crickets.
Females form an egg case called an:
ootheca
Rather than leaving it externally, the female retains it internally while the embryos develop.
The young are then born as live nymphs.
Gestation
Under warm favourable conditions, development of a brood generally takes around:
two months
although temperature and colony conditions affect timing.
A female may produce multiple broods during her life.
Brood Size
A healthy adult female may produce roughly:
20–40 nymphs
in a brood, although numbers vary.
Not every female reproduces continuously.
Temperature, nutrition and disturbance all influence reproductive output.
Growth
Nymphs pass through multiple moults before becoming adults.
Growth rate depends strongly on temperature.
Under optimal warm conditions, development to adulthood may take several months.
Cool conditions can extend this considerably.
Newly Born Nymphs
Newborn nymphs are very small and pale immediately after birth.
They darken as the exoskeleton hardens.
They can remain within the adult colony.
No separate nursery is normally required.
Harvesting Feeders
Select roaches according to the size of the animal being fed.
As a general principle, prey should be appropriately sized for the predator.
Avoid routinely feeding prey that is excessively large.
Maintain enough breeding adults so that continual harvesting does not collapse the colony.
Maintaining Breeding Stock
Do not feed out all adult females.
A healthy breeding population needs a stable base of mature females.
Similarly, retain enough males for successful mating.
A useful strategy is to harvest mainly:
- surplus nymphs
- excess males
- appropriately sized juveniles
while protecting core breeding stock.
Overcrowding
Very dense colonies may experience:
- slower growth
- competition
- poor ventilation
- increased waste
- reduced reproductive performance
If a colony becomes excessively crowded:
- split it into multiple tubs
- enlarge the enclosure
- increase food and ventilation appropriately
Cleaning
Routine cleaning should balance hygiene with avoiding unnecessary disruption.
Remove:
- dead roaches
- mouldy food
- heavily spoiled cardboard
- excessive frass
Egg flats can be replaced gradually.
There is rarely a need to sterilise the entire colony repeatedly.
Frass
Frass is the accumulated droppings and fine debris produced by the colony.
A small amount is normal.
Large accumulations can:
- reduce hygiene
- harbour mites
- hold excessive moisture
- make sorting difficult
Remove excessive frass periodically.
Mites
Mite outbreaks are usually associated with:
- excessive moisture
- excess food
- poor ventilation
- dead insects
Correcting these conditions often reduces mite populations.
Do not use insecticides around a feeder colony.
Mould
Mould usually results from:
- too much fresh food
- poor airflow
- high moisture
Remove contaminated food and cardboard.
Improve ventilation if necessary.
Odour
A healthy Dubia colony normally has relatively little smell compared with cricket colonies.
Strong unpleasant odours suggest:
- dead animals
- spoiled food
- excessive moisture
- poor ventilation
- overdue cleaning
Investigate rather than masking the smell.
Handling
Dubia Roaches are harmless to people and do not sting.
They can be picked up gently or moved using:
- cups
- tubs
- egg flats
- soft tools
Some people may develop allergies after prolonged exposure to cockroach material.
Wash hands after colony maintenance and avoid inhaling dust from dried frass.
Allergy Considerations
Repeated exposure to cockroach proteins can contribute to allergic reactions in susceptible individuals.
When cleaning large colonies:
- avoid creating airborne dust
- work in a ventilated area
- consider gloves
- wash hands afterwards
People with known severe cockroach allergies should take particular care.
Using Dubia Roaches as Feeders
Dubia Roaches are suitable for many insectivorous animals, including certain:
- lizards
- amphibians
- tarantulas
- predatory invertebrates
Whether they are suitable as a major feeder depends on the nutritional requirements of the animal being fed.
A varied feeder rotation is generally preferable to relying exclusively on one insect species.
Feeder Size
Choose prey appropriate to the predator.
For many reptiles, a commonly used rule is that feeder width should not greatly exceed the space between the animal’s eyes, although species-specific feeding guidance should always take priority.
Very small animals should receive suitably small nymphs.
Supplementation
Depending on the animal being fed, Dubia Roaches may require dusting with:
- plain calcium
- calcium with vitamin D3
- multivitamin supplements
Supplement type and frequency depend on:
- species
- age
- reproductive condition
- UVB provision
- overall diet
Follow the care requirements of the predator rather than applying one supplementation schedule to every animal.
Escapees
Dubia Roaches are less likely than pest cockroaches to establish in ordinary cool homes, but containment remains important.
Never deliberately release them outdoors.
Recover escapees whenever possible.
Legal Considerations
Rules concerning cockroach species vary between countries and regions.
Before importing, breeding or distributing Blaptica dubia, check current local legislation.
Some jurisdictions restrict certain non-native cockroaches because of concerns about establishment or agricultural risk.
Responsible Culture
A good feeder colony should be:
- clean
- well ventilated
- appropriately fed
- free from chemical exposure
- protected from wild insects
- maintained at stable temperatures
Do not feed insects to reptiles or amphibians if the colony has been exposed to:
- pesticides
- insect sprays
- toxic cleaning products
- contaminated food
Common Problems
Colony Not Breeding
Check:
- temperature
- adult sex ratio
- food quality
- overcrowding
- disturbance
Cool temperatures are one of the most common reasons for poor reproduction.
Nymphs Growing Slowly
Possible causes include:
- low temperatures
- poor nutrition
- overcrowding
Strong Odour
Usually associated with:
- spoiled food
- dead insects
- poor ventilation
- excessive moisture
Mites
Usually encouraged by excessive food and moisture.
Adult Deaths
Some adult mortality is normal with age, but sudden widespread losses require investigation of:
- temperature
- contamination
- food
- moisture
- chemical exposure
Advantages as a Feeder
Dubia Roaches are popular because they:
- come in many useful sizes
- do not jump
- move relatively slowly
- are easy to gut load
- produce little odour when maintained correctly
- breed reliably under warm conditions
- are less noisy than crickets
- are straightforward to contain
Considerations
They also have limitations:
- breeding requires warmth
- colony establishment takes time
- adult males possess wings
- some jurisdictions restrict them
- cockroach allergens can affect sensitive keepers
- they should not be used as the sole feeder for every species
Summary
The Dubia Roach is one of the most useful captive feeder insects available.
Successful culture centres on:
- secure smooth-sided housing
- good ventilation
- vertical egg-flat structure
- temperatures around 27–30°C for strong reproduction
- a balanced omnivorous diet
- fresh vegetables for hydration
- controlled moisture
- appropriate breeding ratios
- regular removal of spoiled food and dead insects
- protection from pesticides and household chemicals
A well-maintained colony can provide a reliable range of feeder sizes while allowing complete control over the insects’ diet and condition.
For reptile and amphibian keepers using live prey regularly, establishing a healthy Blaptica dubia colony can significantly improve feeder reliability and husbandry consistency.
IMPORTANT INFORMATION
This guide provides general husbandry and feeder-culture guidance and does not replace species-specific nutritional research or veterinary advice.
Feeder suitability, prey size, supplementation and feeding frequency must always be matched to the requirements of the animal being fed.
Check current local regulations before breeding, importing or distributing non-native feeder insects.
Information correct at the date of publication.
reptilecommunity.com | Revised: August 2026