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This is a list of butterflies and moths—species of the order Lepidoptera—that have been observed in the U.S. state of Arizona.

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This is a list of butterflies native to the U.S state of Georgia.

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An estimated 1,150 species of Lepidoptera, the order comprising butterflies and moths, have been recorded in the U.S. state of Hawaii. Of these, 948 are endemic and 199 are nonindigenous species.

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Gossamer-wings are the smallest butterflies. Their wingspans range from 0.5-2.0 inches (1.2-5.1 cm). There are about 7,000 species worldwide with about 139 species in North America. Gossamer-wings include the subfamilies hairstreaks, harvesters, coppers, and blues. Their flights vary from the fast, erratic hairstreaks to the slow, bouncy blues. They like to feed at flowers, and males like to puddle at damp ground. Most male gossamer-wings locate females by perching, while some males patrol. The turban-shaped eggs are usually laid singly. The larva is oval shaped with a flattened underside. Some species have honeydew glands that attract ants. Ants like to eat and collect the honeydew made by the caterpillar. In turn, the ants will swarm over anything that might try to harm the larva. The chrysalis is usually formed in leaf litter. Many chrysalises can make faint noises. Scientists believe this noise might ward off predatory ants.

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This is a list of all butterflies and skippers found in the state of Oklahoma. Butterflies and skippers are a monophyletic group found in the insect order Lepidoptera. (See the difference between a butterfly and a moth.)

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This is a list of butterflies found in the U.S. state of Oregon.

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Swallowtails are the largest butterflies. They range in size from 2.5–6.4 inches (6.5–16.5 cm). There are about 600 species worldwide with about 31 species in North America. All swallowtails have tails on their hindwings. Their flight is slow and gliding but, when disturbed, their flight can be quite strong and rapid. They like to feed on various flowers, dung, and urine, and males like to puddle on damp ground. Most male swallowtails locate females by patrolling, and some males perch. The eggs are round and usually laid singly on different kinds of host plants. The larvae have a reddish-orange forked gland, called an osmeterium just behind the head. When frightened, the larva thrusts the gland out releasing a foul odor that will sometimes deter a predator. Many young swallowtail larvae resemble bird droppings. The chrysalis of most species is brown or green and looks like a leaf or branch. It is held upright by a silken loop around the middle called a girdle. The swallowtails overwinter as a chrysalis.

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Whites and sulphurs are small to medium-sized butterflies. Their wingspans range from 0.8-4.0 inches (2-10.2 cm). There are about 1,000 species worldwide with about 61 species in North America. Most whites and sulphurs are white, yellow, and orange with some black, and some may be various shades of gray green. Their flight is mostly slow and fluttering, but some of the larger species have quicker flights. Both males and females like to feed at flowers, while males also like to puddle on damp ground. Male whites and sulphurs locate females by patrolling. The eggs are spindle shaped and laid singly. Most of the long-slender larva are green or yellow. The chrysalis is usually triangular or cone headed. It hangs upright supported by a silken loop around the middle. The overwintering varies with species. It may be larva, chrysalis, or adult.

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This is a list of Lepidoptera observed in the U.S. state of Utah.