ON THE ROAD — Big trees and a little camper. We took delivery of our tear drop camper in Adelaide and yesterday we stopped for lunch at Poocher Swamp just out of Bordertown, near the South Australian/Victorian state borders. The trees are Red River Gums (Eucalyptus camaldulensis) and these are the dominant species at the swamp. These are not the biggest of their species at Poocher. One appeared in a news report in 1966 as measuring 10.5m in circumference and another was said to have a diameter at breast height (DBH) of 3.34m. The hydrology of Poocher Swamp is unusual and signs warn of the dangers of “runaway holes”. After good seasons Tatiara Creek quickly refills Poocher swamp and when it reaches a sufficient level it starts to flow quickly underground down these “runaway holes” which deliver surface water to aquifers. Some holes are permanent, but others can appear at random. When the flow is too much for these to absorb, outflow from the swamp goes downstream to Scown’s Runaway Hole. In floods in 1981 this hole was taking in water at a rate of 4,500 litres per hour.