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Welcome to the project!

Welcome to the Blue Mountains Crayfish Count Project!

Thanks so much to everyone who has joined the project and submitted observations so far. It’s great to see records coming in from all across the Blue Mountains.

To get started, here’s a brief guide to identifying our local crayfish.

The Blue Mountains is home to two native species of crayfish, Euastacus australasiensis (Sydney Crayfish) and Euastacus Spinifer (Giant Spiny Crayfish). Although similar in appearance, these species have 2 main distinguishable features.

First, is the number of small spines located on the lower segment of the interior of each claw, known as mesial carpal spines. E. australasiensis possesses 3 mesial carpal spines whilst E. Spinifer only has 2.

This observation of an E. australasiensis claw is a great example, where you can clearly see the 3 spines on the segment below the claw.

...more ↓

Posted on April 14, 2021 01:14 by ablackwood ablackwood | 0 comments | Leave a comment

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Help us to help our crayfish, and get involved with the Blue Mountains Crayfish Count.

The iconic brightly coloured crayfish of Blue Mountains streams are long-lived, slow-growing species, and are a very important part of stream ecosystems.

Blue Mountains City Council runs annual crayfish surveys in three areas and waterbug surveys at more than sixty sites, but we are ...more ↓

Mini ablackwood created this project on December 22, 2020
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