The animal died after being shot with a bow and arrow and run over with a motorcycle.
In another incident, an adult male kangaroo was shot in the ankle at Melville Glades Golf Club. Wildlife officers took it to Perth Zoo on April 13 to have the arrow removed before returning it to the club.
Senior wildlife officer Rick Dawson said anyone with information about the shootings should call the department’s Wildcare helpline.
‘Firing arrows into defenceless native animals is cruel and unacceptable behaviour,’ he said.
Mr Dawson said the kangaroo shot near the park’s Yanchep Inn was found on April 11 by a ranger several days after its death.
‘There were two bloodied arrows found near the body and tyre tracks indicating that a motorbike had run over its neck,’ he said.
The Wildcare helpline is 9474 9055.