Some forms of Australian scrub are fairly thick. You aren't always walking on a forest floor amongst trees or pushing through soft bracken. Some types are dense

Some forms of Australian scrub are fairly thick. You aren't always walking on a forest floor amongst trees or pushing through soft bracken. Some types are dense and spiky. If it's too steep for grazing, in a country with a meagre population like Australia I'm not surprised at all that some areas go unnoticed.