The pub owners have forgotten that humans only live in Australia because the Emus let them...
https://www.atlasobscura.com/articles/in-1932-australia-declared-war-on-emus-and-lost
The machine-gunners’ dreams of point blank fire into serried masses of Emus were soon dissipated.
The Emu command had evidently ordered guerrilla tactics, and its unwieldy army soon split up into innumerable small units that made use of the military equipment uneconomic. A crestfallen field force therefore withdrew from the combat area after about a month.
Hilarious!................