Team tracks island’s frogs
THE conservation team on Rottnest Island has been monitoring its three species of frogs since 2004.
The amphibians are spread across nine sites and the team regularly visits those sites at night to record the range of calls, frogs and tadpoles and the quality of the water.
When Western Suburbs Weekly editor Denise Cahill and photographer Andrew Ritchie joined the team late last year, they discovered a motorbike frog within minutes.
The frog’s call that sounds like a motorbike changing gears was easy to identify.
These frogs breed from early spring to late summer. Rottnest Island Authority terrestrial conservation officer Cassyanna Thomas said monitoring the frogs helped them determine the health of the wetlands.
Ms Thomas said frogs had been on the island for 7000 years and, like the dugite and bobtail lizard, had adapted to the island environment.
Cassyanna Thomas, Rottnest Island's terrestrial conservation officer with a motorbike frog.