Giant burrowing cockroach

Description

The giant burrowing cockroach (Macropanesthia rhinoceros) is also known as the rhinoceros cockroach, and Queensland giant cockroach. These cockroaches are native to Australia and mostly found in tropical and subtropical parts of Queensland. They are the world's heaviest species of cockroach and can weigh up to 30-35 grams and measure up to 7.5-8 cm (3.1 in) in length. It is a member of the family Blaberidae, which contains hundreds of species. It is part of the blaberid subfamily Geoscapheinae. It is prominent in the wild and can also be sold and kept as a pet. Unlike some other cockroaches, the giant burrowing cockroach does not have wings and is not considered a pest. This species plays a vital part in the ecosystem by consuming dead leaves, eucalyptus in particular, and recycling other matter. They may burrow down in soil to a depth of about 1 m (3 ft 3 in), where they make permanent homes and feed on collected dry leaf litter. The giant burrowing cockroach is the only cockroach in the world known to have permanent burrows in the soil. The species play an important ecological role in that it contributes to the recycling of nutrients in the wild. The cockroach is popular in Brisbane and is frequently sold as a pet. The giant burrowing cockroach is identifiable by its large size and weight. An adult can reach over 60 mm and up to 75-80 mm, and can weigh up to 30-35 grams. The pronotum is a prominent plate-like structure that covers the first segment of the thorax, has short tubercles at the sides, and can exceed 15 mm. Their pronotum assists with digging, acting as a shovel while its abdomen rests on the ground. The cockroach use their spiny tibiae in order to dig and burrow into the ground. The giant burrowing cockroach is well adapted for burrowing and digging with large back legs and a strong body armour, which offers protection from predators. It is one of few native Australian cockroaches without wings, with a concurrent lack of mobility. It is nocturnal. Adult males and females can be differentiated by the size of the "scoop" on the pronotum, which covers the head; with the male having a much more pronounced scoop. They grow by moulting several times before reaching full size. When a cockroach moults, it will appear pure white except for the eyes. Individuals have lifespans up to ten years in captivity. Adult males are more commonly-encountered than females.