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Papilio glaucus
You are welcome. Another similar, but not as common in your area is the Canadian Tiger Swallowtail. Keep a keen eye open for this smaller species; http://www.butterfliesandmoths.org/speci... Project Noah is a good way to learn butterflies and moths.
@gatorfellows...thank you...I had looked it up but wanted a confirmation
I'm new to butterfly spotting
A female has has 2 forms: one yellow like the male and the other black with shadows of dark stripes. Hindwing of both female forms has a row of striking blue chevrons and an iridescent blue wash over parts of the interior hindwing.