I've got a small tree, about 2 meters high, in a pot. It has been getting
circular chunks, (4-6mm in diameter), cut out of its leaves, over the last 6
months. It is mid spring here, sub-tropical and coastal. I have not seen any
insects at work, but have heard that they do this sort of thing.

The tree is getting cut up pretty bad, almost to the point it is starting to
look unwell.

Any ideas would be welcome.

Cheers Pax