Orange Spotted RoachApril 15, 2021
The Dubia Roach (Blaptica dubia), also known as the Orange Spotted Roach, Guyana Spotted Roach, or Argentinian Wood Roach is a medium-sized species of cockroach that grows to around 1.6 – 1.8 in.
They are sexually dimorphic; adult males have full wings covering their body, while females have only tiny wing stubs – their tegmina (forewings) being around a fourth of their body length. Adults are dark brown to black with somewhat lighter orange spot / stripe patterning sometimes visible only in bright light. Colouration differs slightly with environment and diet from one colony to another.
Blaptica dubia ovoviviparous, giving birth to live young after eggs hatch inside the female, and can give birth to 20 to 40 nymphs per month under favourable conditions.
The Dubia Cockroach is found in Central and South America, beginning in Costa Rica. It is common from French Guiana and Brazil to Argentina.
While rarely known to fly, adult males have fully developed wings and pigmented musculature typical of cockroaches able to meet the rapid energy requirements of sustained flight. Adult females have only rudimentary forewings and lack the muscles required for flight.
Blaptica dubia species, generally giving birth to live young, and pregnancy in one study lasted 48 – 64 days, in a 26°C (78.8°F) environment with alternating 12-hour light and dark photoperiods. It carries the ootheca (egg capsule), which holds about 20 – 35 eggs until they are ready to hatch or may drop it earlier under stress conditions. Adults live for up to 2 years, females slightly longer than males. Growth and reproduction rates are sensitive to environmental conditions, optimally 25 – 30°C and above 60% relative humidity.
Blaptica dubia has become a popular feeder insect, particularly among tarantula, amphibian, and reptile enthusiasts and owners. Keeping or breeding the insect is made easier by their inability to jump or climb smooth surfaces, relatively slow movement, and rarity of flying. They are also quiet, unlike crickets, and tropical environmental requirements reduce the likelihood of the establishment of escapees in colder, dryer climates.