Carnaby was born at Subiaco, WA., on 24 July 1908.
His interests include farming, entomology and, especially, ornithology. He has published a number of papers on bird life in south-western Western Australia, in Emu, Western Australian Bird Notes and the Western Australian Naturalist. As a naturalist his interests extended to plants and he did several collecting trips with H. Steedman in the period 1937—39.
Hall, N. (1978) Botanists of the eucalypts. Commonwealth Scientific and Industrial Research Organisation, Melbourne.