Fall Desktop Wallpaper

What kind of butterfly is this?

http://www.free-nature-animal-butterfly-wallpaper.com/butterfly10.html I saw this in my backyard and have been curious ever since.

Public Comments

1. It looks like a form of Swallowtail. But to be specific it looks like the Anise Swallowtail.
2. Maybe it's Tiger swallowtail butterfly !!! The tiger swallowtail butterfly(Papilio glaucas) is a strong flier with distinctive yellow and black striped markings on its wings and body (some females are brown or black, mimicking the poisonous pipevine swallowtail). This butterfly has a wingspan of 3.5-6.5 inches (9-16.5 cm) and is found throughout the USA and Canada. The caterpillar is plump and green with yellow eyespots; it looks like bird droppings when young. Larvae eat leaves from the tulip tree, sweet bay, wild black cherry, ash, lilac, aspen, birch, and choke cherry. Different species in them with varying colors http://www.butterfliesandmoths.org/search?searchbox=tiger Hope am close to the answer !!!