Bug FAQAustralian Cockroach
Validiblatta australasiae
The Australian cockroach is a tropical species about 23 to 35 mm long, brown with a pale stripe on the wings and a yellow margin on the pronotum and thorax. It originated in Africa, prefers warm climates, often lives around building perimeters, and may enter homes seeking food. Its diet is mainly plant material but it will also scavenge on a wide range of organic matter.
Source: Wikipedia
How to recognize it
It is brown overall with a noticeable pale stripe on the wing covers and a contrasting pale or yellow edge on the head shield, plus a yellow margin on the thorax and side streaks near the wing base.
Source: Wikipedia
Size
Adults measure between 23 and 35 mm in length.
Source: Wikipedia
Is it a pest in the house?
It may come indoors looking for food and can live inside, especially in warm weather, but also moves outdoors when it gets hot.
Source: Wikipedia
Where it lives
It favors warm environments and is not tolerant of cold, though it can survive indoors in cooler regions. It typically lives around the edges of buildings.
Source: Wikipedia
What it eats
It prefers plant material but will also eat a wide variety of organic and decaying matter.
Source: Wikipedia
Where it comes from
The species probably originated in Africa.
Source: Wikipedia
Lookalikes
It looks very similar to the American cockroach and can be easily mistaken for it.
Source: Wikipedia
Where it is found in the US
Recorded in 51 of 51 states and DC. Most records: California, Texas, New York, Florida, Pennsylvania, Ohio, Arizona, Massachusetts.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: introduced in North America. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Same family ()
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Australian_cockroach
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-22 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-22.