Mount Gravatt Environment Group

By: Michael Fox

The Clairvaux McKillop Bushcare Team returned again yesterday clearing another huge area of weeds and having fun finding beetles, spiders and millipedes.

One interesting find is a Leaf Beetle we have not found before in the Reserve. I have been getting frustrated trying to identify the species. However, now I know there are over 3,000 species I feel a bit better. “Beetles in the family Chrysomelidae are commonly known as leaf beetles. In Australia there are over 3,000 species of leaf beetles feeding on living roots, leaves, stems, flowers, pollen, fruits and seeds. Some larvae feed inside living plants.” Queensland Museum I have submitted our observations to iNaturalist and hope to get a species id so it can be added to Flora and Fauna of Mt Gravatt Conservation Reserve.

It is common for these beetles to drop to the ground when disturbed probably a defence mechanism. These cute beetles tuck their legs in very neatly effectively creating a flat surface that will just slide off the leaf.

The team also found a Millipede which have an important role in recycling the leaf litter on the forest floor releasing valuable nutrients for the flora.

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Our first spider find was Pyramidal Theridion Theridion pyramidale: resembling a pyramid in shape and Theridion is a genus of tangle-web spiders with almost 600 described species around the world.

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I was impressed that team members identified Golden Orb-Weaver Nephila edulis without my input. They also talked about the way the web glows gold in the sun. The Atlas maps shows these spiders are found all over Australia.

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Red Narrow-necked Leaf Beetles Lilioceris bakewelli feed on Barbed Wire Vine Smilax australis.

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Black-headed Orange Wasp Gavrana spinosa is a new species for Flora and Fauna. Ichneumon wasps are not dangerous for humans but they perform valuable pest control services in our gardens by parasiting moth larvae.