An ecological classification of the burrows of Australian freshwater crayfish

A classification of freshwater crayfish burrows, based on their relationship to the water-table, is presented. Burrows are divided into three classes, the third of which is apparently not found outside Australia and contains burrows which are independent of the water-table, receiving their water from surface run-off. The classification is compared with Hobbs classification of North American crayfish which is based on their burrowing behaviour.