Ralph and I walked the loop. We passed a stand of olive trees which were alive with currawongs. We went over to have a closer look and found one tree was covered in small, ripe, black olives. Ralph loves olives and seeing the currowongs so enjoying themselves, asssumed the olives would be tasty for him. I told him otherwise but he was already heartily chewing one - he couldn't get the disgusting, bitter thing out of his mouth quickly enough and the flavour took ages to disappear.
There are quite a lot of olive groves around Canberra, owned by hobby farmers looking for easy crops to fill niche markets. In South Australia, where they have been grown for much longer, they have become feral pests. It's a dilemma - we're being encouraged to move away from English garden plants and grow drought hardy species but these can then survive in the wild and may become pests - even Australian plants can become pests out of their source regions. 6 km