Who were the 'Bluebirds' during the First World War?

Discover Canada records this in a single caption: More than 3,000 nurses, nicknamed "Bluebirds," served in the Royal Canadian Army Medical Corps, 2,500 of them overseas. The women the test wants are therefore nurses in the Royal Canadian Army Medical Corps — the only role Discover Canada attaches to the nickname Bluebirds.

Two numerical details matter. The total was more than 3,000 nurses; of these, 2,500 served overseas. So most of the Bluebirds in Discover Canada's account were not behind the lines at home but actually deployed in the war zone, with the Royal Canadian Army Medical Corps providing care close to where the fighting was.

The Bluebirds nickname is part of Canada's wider First World War effort that Discover Canada describes. The guide says "more than 600,000 Canadians served in the war, most of them volunteers, out of a total population of eight million," and that "in total 60,000 Canadians were killed and 170,000 wounded." The 3,000 Bluebirds were part of those 600,000+ — and their work providing medical care was directly tied to the 170,000 wounded.

The Bluebirds also fit inside Discover Canada's broader picture of women's contributions in this period. The guide notes that women's federal voting rights began with the wartime extension under Sir Robert Borden in 1917, with the right going first to "nurses at the battle front, then to women who were related to men in active wartime service" — exactly the kind of nurses the Bluebirds were.

The question is testing whether new citizens have remembered the nickname's specific meaning. Discover Canada attaches the name Bluebirds to one role only — nurses in the Royal Canadian Army Medical Corps — and adds two precise numbers (3,000+ nurses; 2,500 overseas) to lock down the picture.

The wrong answer choices each invent roles Discover Canada does not give to the Bluebirds. The guide does not call Canadian women pilots, female infantry, or women factory workers "Bluebirds." Picking another option swaps in a role for a label that has only one meaning in the guide.