Gunner.

"Gunner was a stray male kelpie who was found under a destroyed mess hut at Darwin Air Force base on 19 February 1942, after Darwin was bombed.

Leading Aircraftman Percy Westcott, one of the two airmen who found Gunner, took ownership of him and became his master and handler. At first, the dog was badly shaken after the bombing, but being only six months old he quickly responded to the men's attention. About a week after, Gunner first demonstrated his remarkable hearing skills. While the men were working on the airfield, Gunner became agitated and started to whine and jump. Not long afterwards, the sound of approaching aeroplane engines was heard by the airmen. A few minutes later a wave of Japanese raiders appeared in the skies above Darwin and began bombing and strafing the town.

Two days later, Gunner began whimpering and jumping again and not long afterwards came another air attack. This set the pattern for the months that followed. Long before the sirens sounded, Gunner would get agitated and head for shelter. Gunner's hearing was so acute he was able to warn airforce personnel of approaching Japanese aircraft up to 20 minutes before they arrived and before they showed up on the radar. Gunner never performed when he heard the allied planes taking off or landing; only when he heard enemy aircraft as he could differentiate the sounds of allied from enemy aircraft.

Gunner was so reliable that Wing Commander McFarlane gave approval for Westcott to sound a portable air raid siren whenever Gunner's whining or jumping alerted him.

Gunner became such a part of the airforce that he slept under Westcott's bunk, showered with the men in the shower block, sat with the men at the outdoor movie pictures, and went up with the pilots during practice take-off."

Information from wikipedia. 

So there. Be kind to animals. You never know what they are capable of, given a chance.