iHerp Australia Issue 10 | Page 15

The next step was very important and had to be completed before we could continue with the fence. An excavating contractor was employed to sculpt the terrain inside the enclosure. Working from the outside, and using a large machine (but a soft touch), he dug a moat of irregular width (1-2.5m) by scraping the soil away from the concrete base of the fence. I wanted to leave about 200mm of the base in the ground, which meant that about 700mm of the concrete would be exposed inside the enclosure. Some of the excavated soil was used to build up the ground in the centre of the enclosure, and the rest was carted away. Soon the horizontal metal rails were welded to the posts, and the fence panels could be screwed on. 1. I was well aware that the moat would fill up with water and even overflow during the wet season. The small gap between the metal panels and the concrete base would allow the water to flow out right around the perimeter. The gap is not big enough for Cane Toads to enter – a nightmarish scenario I don’t even want to think about. When the rain stops the moat dries out within a few weeks. There was some established vegetation in this first enclosure, and we only added a few carefully selected hollow logs. There was no gate, and access was via a specially-made ladder, which was light and portable. This enclosure was used to house a group of Bell’s phase Lace Monitors, consisting of a large male (1.65m) and three females (around 1.3m). 2. 3. After this first enclosure had been in use for a couple of years, we decided to build another one for Perenties. The concept and size was to be the same, with only minor changes. The metal panels were amended to 1000mm in height, making the fence slightly lower, and a gate was added to the design, since my wife thought I was getting too old to climb over the top! The excavator built up the middle ground a little higher and compacted 1. The bobcat digs a post hole. the added soil and clay with its wheels. Before dig- ging out the last bridging section between the centre 2. The concrete has been poured and the posts are in and the outside, some of the heavy objects like place. granite boulders and a big hollow log were brought in. On completion of the earthworks, I could take my 3. Excavating the interior against the concrete foundation of the fence. Images reproduced from original printed copy by time to work on some important details. It would take years for the trees inside the enclosure to grow Andy Round.