A backyard garden ecosystem comprises of healthy plants and trees, and even includes insects. There are some bad bugs we don’t want in our gardens, but there are also a lot of good ones we want to encourage and, in some cases, actually need in our gardens. Dr Lizzy Lowe with Cesar Australia explains what these good bugs are and how they can be beneficial in your garden. For more information visit the Urban Plant Health Network. If you see something unusual, call the Exotic Pest Plant Health line on 1800 084 881 or take a photo and upload it to the MyPestGuide Reporter.