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Rottnest's frogs are genetically distinct from mainland populations. Good water quality is vital for the survival of Rottnest’s frog populations. The brackish wetlands on Rottnest (swamps and seeps) provide very important breeding sites and habitat for this species.
Squelching Frogs breed during the wet late autumn and winter months, but you can hear some males calling in late spring. When calling, males often sit in fairly exposed places either in or next to open water. However, they also call from dense vegetation in the swamps.
Females lay their singly or in clumps in shallow water. The eggs sink to the bottom where they become hidden by a mud coating. The tadpoles are usually found in the shallows of permanent and temporary water.
During the day they lie still on the bottom, but they will bury themselves in the mud when disturbed. They take 2-5 months to grow into adult frogs.