The solution was to build a nesting box out of the same materials the vent was constructed from. The nesting box was positioned conveniently nearby to the dryer vent but also out of reach of the domestic animals and the weather. Then, in between batches of chicks, I block the vent with a grill. The Pardalotes found their new abode within 15 minutes of discovering the old one was decommissioned. As a result the Pardalotes have now raised between 2 and 4 chicks every spring for the last couple of years and I can use my dryer without fear of harming the local fawner.
This instructable covers how I built my Pardalote Nesting Box, Tube, Thing from 90mm Storm Water pipe. The results have been very satisfying. The project was very low cost and quite easy to build. On at least three occasions now, I have been able to watch a clutch of Pardalote chicks take flight and leave the nest for the very first time. An incredibly satisfying event every time.