And here I thought this familiar yellow butterfly of mid-late summer was called a Yellow Sulphur butterfly. I am often wrong about butterflies. I'm learning to live with this.
You, too, can find this butterfly in Canada, and elsewhere in North America, unless you are in Labrador, the Arctic and Northern Quebec. They don't visit these places. However, the Gov't of Canada info page here also says the Clouded Sulphur ranges to the Arctic Ocean in the Yukon. Isn't that 'the Arctic'? I will assume GofC means these butterflies don't range across the vast northern tundra of NWT and Nunavut
Everyone knows the Cabbage Butterfly (Pieris rapae). A few were fluttering around in the backyard earlier today.
A great site for Moth & Butterfly information is: