San Francisco Butterfly Count Results, 2011

The results are in! The sunny day paid off; the teams (34 people) saw 990 967 butterflies of 26 species. Last year, it was 775 butterflies, 24 species. The count this year was a month later than in 2010, and in hot weather rather than on cold and foggy day. Also, they looked on Angel Island for the first time.

The Cabbage Whites were the most common. Next were the striking yellow Anise Swallowtails. These two butterflies accounted for nearly half the butterflies the teams observed.

If you’re interested in more detail, there’s a full list here.