Spring comes to the Australian Alps like an invisible spirit. There is not the tremendous surge of upthrust life that there is in the lowland valleys, and no wild flowers bloom in the snow mountains till the early summer, but there is an immense stirring of excitement. A bright red and blue lowrie flits through the trees; snow thaws, and the streams become full of foaming water; the grey, flattened grass grows upwards again and becomes greener; wild horses start to lose their winter coats and find new energy; wombats sit, round and fat, blinking in the evening sunshine; at night there is the cry of a dingo to its mate.