@huvesaker ha ha, made me laugh. They are little plastic shelters around new native trees and grasses which the local council have been planting to restore the creek area to its natural state having got rid of pesky olive trees and other non natives that had taken over.
thankyou all for your visit. We are very lucky to have such a lovely view from our house. No noisy traffic either and we are only 20 minutes from the city of Adelaide