Western tiger swallowtail

a member of the Papilio genus, of which Papilio appalachiensis and Papilio xuthus are also members. It is a large, brightly colored and active butterfly, rarely seen at rest; its wingspan is 7 to 10 cm (3 to 4 in), and its wings are yellow with black stripes, and it has blue and orange spots near its tail. It has the "tails" on the hindwings that are often found in swallowtails.-Wikipedia