No they are not. They are on the endangered list but not extinct (yet).

There are several thousand species of butterflies, the majority of which are not endangered. However, a few species, such as the Bay Checkerspot and Saint Francis' Satyr are endangered and protected.

The Baltimore Checkerspot butterfly was named after Lord Baltimore. and became the Maryland state butterfly in 1793

Yes the Karner Blue Butterfly happens to be an endangered species!

The checkerspot butterfly is only6 found in the United States. This butterfly lives around the areas of San Francisco in California.