Concern grows for Metro Vancouver's butterflies as sightings plummet by more than half over last year
![The David Suzuki Foundation is recruiting butterfly rangers in Victoria, Richmond, Montreal, Toronto and Markham. A butterfly on a flower.](https://i.cbc.ca/1.3911554.1720837797!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_620/usa-dailylife.jpg)
Extreme swings in weather might be to blame, but research shows planting more native trees in cities could help.
Extreme swings in weather might be to blame, but research shows planting more native trees in cities could help.