The red fire ant has been detected on the western side of the Great Dividing Range for the first time and a biosecurity group says the "window of opportunity" to eradicate the exotic pest is closing.

A group of great blue herons nests in the tall black cottonwoods of Ross Island, away from the dredged lagoon and just across the river from uber-urban South Waterfront. These big, gangly birds ...

It has always been present around the fringes of Sydney and west of the Great Dividing Range, but over the last ... about the ecology of this charismatic bird. Little is known about the movements ...