9. Exotic allies

You are already familiar with the fact that pigeons were often used during wars to deliver messages or news. However did you know that other birds were useful during a war?

For instance, parrots were known to give warnings when enemy aircraft were approaching. While on the sea, sea-gulls usually exposed the presence of submarines and mines which helped saving the lives of thousands of sailors.

With the help of the canaries, also known as the miners’ friends because of their special ability to recognize gases, during the war these birds could detect when enemy poisonous gas was used.