Australian Cockroach Nymph

A baby cockroach is called a nymph. 

The cockroach is an insect, but it does not undergo a full metamorphosis, because it does not have a pupa or cocoon phase. Its life cycle is: egg, nymph, adult cockroach.

The female cockroach lays 10-40 eggs on the top of soil or other surfaces. They hatch into nymphs after 30-60 days. 

Australian Cockroach (female) and nymphs

The nymphs—hatchlings or baby cockroaches—look like adult cockroaches, but smaller, transparent (clear and colourless), and without wings. They soon turn brown. They feed themselves, without the care of their parents.

The nymph phase lasts for about 60 days, shedding their outer skin 4-7 times as they grow larger. These stages are called instars or instar phases.

The adult stage is called the imago phase when the nymph gains its wings. It grows two pairs of wings. The adult phase lasts for about 200-300 days, and then it dies. 

The Australian Cockroach (Periplaneta australasiae) photographed is a common insect in the roach family. It has a brown waxy exo-skeleton, like a shield. Its head has pale yellow markings, with long antennae. It has wings and can fly short distances. It has pads and hooks on its feet that enable it to climb, even on smooth glass. It grows to 2-4 centimetres (2 inches) in length. 

Photographer: Martina Nicolls

Martina Nicolls: SIMILAR BUT DIFFERENT IN THE ANIMAL KINGDOM

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