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Cockroaches (Blattodea, several families)

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A good reference for Cockroaches is the book “A Guide to the Cockroaches of Australia” by David Rentz. https://www.publish.csiro.au/book/6710/

This webpage by the CSIRO is also useful:
http://anic.ento.csiro.au/insectfamilies/order_overview.aspx?OrderID=42509&PageID=overview

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Cockroaches (Blattodea, several families)

Featured sightings

Johnrehnia contraria (Cockroach) at Aranda, ACT - 26 Dec 2023 by NateKingsford

Ectoneura pallidula at Mount Painter - 20 Feb 2024 by CathB

Ellipsidion australe (Austral Ellipsidion cockroach) at Vincentia, NSW - 1 Jan 2024 by RobG1

Ellipsidion australe (Austral Ellipsidion cockroach) at Mount Ainslie - 9 Dec 2023 by Hejor1

Johnrehnia concisa (A native cockroach) at Brunswick Heads, NSW - 3 Oct 2023 by coddiwompler

Anamesia frenchii at Leinster, WA - 29 Aug 2023 by HelenCross

Balta spuria (A Balta Cockroach) at Cook, ACT - 12 Apr 2022 by CathB

Calolampra sp. (genus) (Bark cockroach) at Harrison, ACT - 23 Aug 2023 by AndyRoo

Latest sightings

Ellipsidion australe at Eaglemont, VIC - 19 Dec 2025 by Hejor1

Unverified Cockroach (Blattodea, several families) at Yass River, NSW - 19 Dec 2025 by SenexRugosus

Blattodea (order) at Crowther, NSW - 18 Dec 2025 by Frecko

Laxta granicollis at Bogong, VIC - 17 Dec 2025 by Hejor1

Johnrehnia sp. (genus) at Gungahlin, ACT - 16 Dec 2025 by chriselidie

Ellipsidion australe (Austral Ellipsidion cockroach) at Turner, ACT - 13 Dec 2025 by AlisonMilton

Ellipsidion australe (Austral Ellipsidion cockroach) at Bredbo, NSW - 12 Dec 2025 by AlisonMilton

Ellipsidion humerale (Common Ellipsidion) at Bright, VIC - 14 Dec 2025 by Hejor1

Ellipsidion australe at Bright, VIC - 14 Dec 2025 by Hejor1

Ellipsidion australe (Austral Ellipsidion cockroach) at Hawker, ACT - 9 Dec 2025 by sangio7

Robshelfordia sp. (genus) (A Shelford cockroach) at Crowther, NSW - 8 Dec 2025 by Frecko

Melanozosteria cingulata (A wingless native cockroach) at Kungala, NSW - 8 Dec 2025 by donnanchris

Ellipsidion australe (Austral Ellipsidion cockroach) at Hawker, ACT - 4 Dec 2025 by AlisonMilton

Ellipsidion australe (Austral Ellipsidion cockroach) at Bruce, ACT - 3 Dec 2025 by AlisonMilton

Ellipsidion australe (Austral Ellipsidion cockroach) at Theodore, ACT - 2 Dec 2025 by Cardy

Ellipsidion australe (Austral Ellipsidion cockroach) at Hawker, ACT - 28 Nov 2025 by AlisonMilton

Ellipsidion australe (Austral Ellipsidion cockroach) at Hawker, ACT - 28 Nov 2025 by AlisonMilton

Escala sp. (genus) at Turner, ACT - 25 Nov 2025 by ConBoekel

Polyzosteria aenea (Pink-tailed heath cockroach) at Tianjara, NSW - 27 Nov 2025 by Harrisi

Ellipsidion australe (Austral Ellipsidion cockroach) at Evatt, ACT - 27 Nov 2025 by gwen

Ellipsidion australe (Austral Ellipsidion cockroach) at Gungahlin, ACT - 24 Nov 2025 by AlisonMilton

Balta spuria (A Balta Cockroach) at Ngunnawal, ACT - 24 Nov 2025 by AlisonMilton

Ellipsidion australe (Austral Ellipsidion cockroach) at Gungahlin, ACT - 24 Nov 2025 by AlisonMilton

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Discussion

DianneClarke wrote:

18 Dec 2025

Cockroach

Blattodea (order)

MichaelMulvaney wrote:

13 Dec 2025

Appears to be a southern extension to known species range

Melanozosteria cingulata

KMcCue wrote:

6 Nov 2025

Thanks, it does look like a cockroach

Ellipsidion australe

AlisonMilton wrote:

6 Nov 2025

@KMcCue Kevin, this is the Ellipsidion australe cockroach

Ellipsidion australe

MichaelMulvaney wrote:

2 Sep 2025

Probably either Johnrehnia or Ectoneura

Blattidae sp. (family)

Significant sightings

Species Richness Score (SRS)

163

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trevorpreston 323
Hejor1 254
AlisonMilton 143
kasiaaus 46
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ConBoekel 39
Harrisi 29
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CathB 28
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