5 Julia Butterfly
The bright orange Julia or Flambeau butterfly likes the warm climate of the Florida peninsula and southern Texas. Its 3 1/4- to 3 5/8-inch wingspan makes it the fifth largest butterfly found in the U.S. Julia tickles, or irritates, Caiman crocodiles’ eyes to provoke tears to drink. It favors flower nectar, especially from shepherd’s needle and lantana plants.
4 Giant White
The fourth largest butterfly, the giant white, or Ganyra Josephina, can be found in southern Texas and seen occasionally in California, New Mexico, Kansas and Florida. The giant white lives on nectar from flowering weeds and plants such as bougainvillea, eupatorium and lantana. It has a round black spot on the upper forewing, which appears faded on females during the dry season. Wingspan of the giant white ranges from just under 3 to nearly 4 inches.
3 Zebra Longwing
With a wingspan of 2-3/4 to 4 inches, the Zebra Heliconian, or zebra longwing, calls the southern United States home. Pollen and nectar from plants, such as shepherd’s needle and lantana, make up the diet of this black and yellow-striped Florida state butterfly. Eating pollen extends the lifespan of the third-largest U.S. butterfly to several months, rather than the average two to four weeks of most species.
The orange and black monarch—Danaus plexippus—has a 3 3/8- to 4 7/8-inch wingspan, making it the second largest butterfly across the U.S. According to the U.S. Forest Service, monarchs from the western U.S. and Rocky Mountains travel to California coastal areas around San Diego, while those from the East Coast migrate to fir forests in Mexico to overwinter. Monarch larvae feed on milkweed plants; adults thrive on nectar from a variety of flowers. Texas and five other states—West Virginia, Alabama, Minnesota, Illinois and Idaho—named the Monarch its state insect.
1 Giant Swallowtail
The largest butterfly found in the U.S.—the giant swallowtail—measures between 4.6 and 7.4 inches, depending on gender. Known as Papilio cresphontes in the science community, this brilliant yellow and black insect dines on the nectar of azalea, goldenrod, dame’s rocket and bougainvillea. Its habitats include citrus groves, pine flats and rocky or sandy streamsides.
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