Southern Grass-dart (Ocybadistes walkeri)
There is a rule of thumb that a flying insect with clubbed antennae is a butterfly. This is generally useful to separate out moths & butterflies. However, there are a number of insects that have clubbed antennae that aren't butterflies, including moths! In reverese, some butterfly antennae aren't as clubbed as others. It's a good reminder that rules of thumb are just that, and do not always apply.