Which butterfly is in the picture?
The butterfly shown in the picture is a common eastern tiger swallowtail of eastern North America. It is found in the eastern United States from southern Vermont to Florida, west to eastern Texas and the Great Plains. Because it has adapted to many different habitats and host plants, it is a generalist, and is not considered threatened.
It is a member of the genus 'Papilio', specifically a species called 'Papilio glaucus'. It is a large, brightly colored and an active butterfly, rarely seen at rest. It's wingspan is 7.9 to 14 cm (3.1 to 5.5 in), and its wings are yellow with black stripes, with blue spots near its tail. It has the 'tails' on the hind wings that are often found in swallowtails.
The eggs are deep green, laid singly, on plants in the Magnolia and Rose families. Young caterpillars are brown and white; older ones are green with two black, yellow, and blue eyespots on the thorax. The caterpillar will turn brown prior to pupating, a life stage undergoing transformation between immature and mature stages.
Adults feed on the nectar of many species of flowers. The male is yellow with four black 'tiger stripes' on each forewing while females may be either yellow or black, making them dimorphism (representing two distinct forms).
The eastern tiger swallowtail is the state butterfly of Alabama (as well as the state mascot), Delaware, Georgia, North Carolina and South Carolina, and it is the state insect of the state of Virginia.