(Grand Forks, B.C. Canada)
Pine White butterfly on thistle blooms
Another white butterfly, but this one is a native type. Varying in numbers, this one can sometimes have a population explosion, and cause defoliation in forests. Obviously from the picture, as adults they are attracted to thistles and other nectar plants.
Compare this to Cabbage White Butterfly and see more butterflies on these pages:
White Admiral Butterfly
Sulphur Yellow Butterfly
Great Spangled Fritillary Butterfly