Team tracks is­land’s frogs

Western Suburbs Weekly - - Street Watch -

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.

Pic­ture: An­drew Ritchie d428226

Cassyanna Thomas, Rot­tnest Is­land's ter­res­trial con­ser­va­tion of­fi­cer with a mo­tor­bike frog.

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