Way back in time the Aus Army was enlisted to help control Emu`s in WA, they were actively using machine guns and as it was proven it was a major fail.
Military involvement was due to begin in October 1932.
[5] The "war" was conducted under the command of Major Gwynydd Purves Wynne-Aubrey Meredith of the
Royal Australian Artillery's 7th Heavy Artillery,
[2][6] with Meredith commanding soldiers Sergeant S. McMurray and Gunner J. O'Halloran,
[8] armed with two
Lewis guns[9] and 10,000 rounds of ammunition.
[6] The operation was delayed, however, by a period of rainfall that caused the emus to scatter over a wider area.
[5] The rain ceased by 2 November 1932,
[2][5] whereupon the troops were deployed with orders to assist the farmers and, according to a newspaper account, to collect 100 emu skins so that their feathers could be used to make hats for
light horsemen.
[10]