The Eurasian Coot is a black gallinule. Gallinules are large crakes (small birds with laterally compressed bodies) with short bills and a coloured frontal shield on their forehead. They graze for food, usually near water or aquatic weeds and sometimes dive for food. The Eurasian Coot is between 32-42cm and will feed on open water like this one living on the Japanese lake at Coffs Harbour Botanical Gardens.
Acknowledgement: The Slater Field Guide to Australian Birds 2nd ed