School term dates. Find out about the current year and next year's term dates for Australia's state and territory government schools. You should confirm with schools directly about specific dates, including pupil-free days.1  Australian Capital Territory. 2  New South Wales. 3  Northern Territory. 4  Queensland. 5  South Australia. 6  Tasmania. 7  Victoria.ind out about the current year and next year's term dates for Australia's state and territory government schools.
Common periwinkles are herbivores, using their file-like tongue, the radula, to feed on diatoms and algae attached to intertidal rocks. The common periwinkle breaks down its food by mixing it with mucous on the radula before bringing the food into its mouth. Sea stars, whelks, and some fish eat common periwinkles.ommon Periwinkle (Littorina littorea). Alternate common names: Periwinkle, Winkle. Color: Shell is dark in color, usually brown, black, or gray. Size: 1 inch long and 3/4 inch wide.
They appear dead but are very much alive. At low tide, they are usually wedged into crevices and cracks in rocks and even inside the empty shells of dead oysters and barnacles. Small but resilient snails, periwinkles can breathe air so they are among the most common snails seen on the rocks above the high tide line.Large groups of periwinkles often form a horizontal band on the rocks as they move with the tides.Some larger periwinkles are found on mangrove trees, clinging on to roots, trunk and even leaves. Among the hardiest of these must be the tiny Knobbly periwinkles (Echinolittorina trochoides). Features: 2-5cm.arge groups of periwinkles often form a horizontal band on the rocks as they move with the tides. Some larger periwinkles are found on mangrove trees, clinging on to roots, trunk and even leaves. Among the hardiest of these must be the tiny Knobbly periwinkles (Echinolittorina trochoides).