Stan, this afternoon I was up Sumas Mountain and I counted 17 Parnassius along the FSR mostly from about kilometer 3 to the main parking lot. The most I've seen at one time as I recall! Maybe it's a good year for them considering Chris's report too.
Gord Fraser Valley Birding Administrator eBird Regional Editor (Fraser Valley)
Gord, I've seen postings that it's a very good year for some other species, especially Mourning Cloak. I've seen more of them than usual this year, but I don't think I've seen more than usual of species like Margined White or Spring Azure or Commas, at least so far this spring and summer.