Papilio rutulus, the western tiger swallowtail, is a common swallowtail butterfly of western North America, frequently seen in urban parks and gardens, as well as in rural woodlands and riparian areas. It is 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... (Wikipedia)