Southwest – Swan Coastal Plain Frogs Swan Coastal Plain Top Image copyright WA Museum An ancient sandy plain formed by the sea in ages past stretches from Jurien to the north of Perth down to Bunbury in the south. The Swan Coastal Plain is made up of deep sandy soils but supports a large number of lakes and swamps. Eight different species of frogs are commonly found in these habitats, including the Motorbike Frog and Slender Tree Frog - the two main inhabitants of Perth backyard ponds. The Squelching Froglet only occurs in this region. Popular places to go 'frogging' in the area are Herdsman Lake, Perry Lakes and Piney Lakes, but good populations can be encountered wherever there is an unpolluted waterbody with decent native vegetation. Frogs of the Swan Coastal Plain region Crawling Toadlet Pseudophryne guentheri Moaning Frog Heleioporus eyrei Motorbike Frog Litoria moorei Quacking Frog Crinia georgiana Rattling or Clicking Froglet Crinia glauerti Slender Tree Frog Litoria adelaidensis Squelching Froglet Crinia insignifera Turtle Frog Myobatrachus gouldii Western Banjo Frog Limnodynastes dorsalis ‹ Southwest – North Coast Frogs Southwest – Darling Ranges Frogs › View the discussion thread.