This family consists of both swallowtails and the sub-family, parnassians. Swallowtails commonly have one or more tail-like features on their hind wings and many are large and colorful.
Parnassians do not have tails and are mainly found in isolated mountainous regions in the western United States.
The photos below will help you identify butterflies in the Swallowtail & Parnassian families. Select a butterfly to see more pictures, descriptions, and the host plants they need to lay eggs.