"The elusive Grass Owl (Tyto Longimembris) is the only Australian Owl to build its nest on the ground under dense tussocks of long grasses. All other owls nest in the tree hollows or caves. These shy owls may be spotted all year round however they are more commonly seen between February and June at dawn and dusk.
This owl is sometimes confused with the Barn Owl. The main difference between them is the Grass Owl's extremely long legs, hence its common nickname of Daddy Long Legs. " - from the informative sign.