Carmel Valley???based Rana Creek, the project???s designer, is already monitoring five other completed San Francisco Bay Area green-roof projects to see whether checkerspots will use them as habitats.???In the last few years, we???ve done 30 roofs that focus on providing habitats for hummingbirds, butterflies, and other species,??? says Paul Kephart, Rana Creek???s executive director. ???It???s a