Insect and Spider Identification: Caterpillar ID, 1 by DaliaR

DaliaR wrote:
This caterpillar has been hanging around my silver buttonwoods for a few days. I'd love to know if he is friend or foe, and if friend, what butterfly will he turn into (if at all!). So far he's the only one I've spotted, though I'm sure there's siblings out there. He's a soft brown shade with a greenish underside.

I've seen plenty of butterflies lately but haven't found a lot of information on silver buttonwoods being host plants for any of them. Can anyone help?
Dalia