Born in Buckley, Flintshire, Birks served in the Royal Artillery for three years before emigrating to Australia in 1913. After serving as a non-commissioned officer during the landing at Gallipoli and the Battle of the Somme, Birks was commissioned as a second lieutenant on 4 May 1917. On 20 September, during the Battle of Passchendaele, while advancing in Glencorse Wood, Ypres, Birks, alongside a corporal, forced a garrison to surrender and captured sixteen men in another attack. His actions were later recognised with the Victoria Cross. The following day, Birks was killed by a shell while attempting to save some of his men.