Anne Elliott's photos with the keyword: serious pest

I'm not sure, but I think this is a Small Cabbage White, rather than a Large Cabbage White - the black marking on the wing tip is only pale. Also not sure, but I think this is a male. I found other photos on Google showing males with just a very faint second spot. If anyone knows for sure, please do let me know. This was spotted in Carburn Park yesterday morning, 17 August 2014. "The upperside of the wings are clear white with black wing tips, one black spot (two in the female) on the forewing, and a black patch on the leading edge of the hindwing. The underside of the hindwing is a pale mustard-yellow colour. Wingspan: 32 to 47 mm. An almost ubiquitous species of the northern hemisphere, the Cabbage White was first introduced into North America in Quebec in the 1860s. It dramatically spread across the continent in the next few decades. It now ranges in Canada from coast to coast." www.cbif.gc.ca/eng/species-bank/butterflies-of-canada/cab...