Guardian Nature School Team Contact Blog Project Noah Facebook Project Noah Twitter

A global community of nature enthusiasts
photographing and learning about wildlife

Join Project Noah!
nature school apple icon

Project Noah Nature School visit nature school

The Harlequin Roach

Neostylopyga Rhombifolia


The length varies from 20 to 27 mm. The tegmina (forewings) of both sexes are small lobes, only about 4 mm long, and hind wings are entirely lacking. Its distinctive colors and patterns make this roach one of the most beautiful species kept as pet by many enthusiast around the world. Very fast in its movements this species is a egg layer and can climb smooth surfaces. In optimal conditions females can lay a large quantity of oothecas (egg case) containing about 15-30 eggs each. Juveniles have a tan uniform color, molt after molt they acquire the characteristic design that distinguish adults.


Originated in Indo-Malaysia, found is the northern part of Australia is now well established in various parts of the Western Hemisphere, including Mexico where it also migrated northward, near the Arizona border, few adults were also found in South California.


It has the ability to produce amyl acetate that smells like pear drops which it uses to defend itself against predators, therefore it would not be a god choice to use it as feeders for reptiles and amphibians.

1 Species ID Suggestions

Hema 9 years ago
Cockroach nymph
Blattella asahinai

Sign in to suggest organism ID


injica 9 years ago

Thank you very much for your correction!

Neostylopyga rhombifolia

injica 9 years ago

tnx :)

injica 9 years ago

tnx looks like the austalian one...but i'm not sure either...

LivanEscudero 9 years ago

It's a cockroach nymph. Not sure what kind.

Spotted by

Union Territory of Puducherry, India

Spotted on Apr 21, 2011
Submitted on Feb 21, 2012

Spotted for Mission

Noah Guardians
Noah Sponsors

Join the Project Noah Team Join Project Noah Team