Eastern Tiger Swallowtail Butterfly Papilio glaucus. Yellow butterfly. Black butterfly. Insect. Photograph taken by the author. Copyright © 2024 Now I Wonder. All rights reserved.

Complete Guide To The Eastern Tiger Swallowtail Butterfly

Eastern Tiger Swallowtail Butterfly

Eastern Tiger Swallowtail Butterfly Images

How To Identify Eastern Tiger Swallowtail Butterflies

  • Wingspan: 3.0 – 5.5 inches (7.6 – 14 cm)
  • Eastern Tiger Swallowtail butterflies come in three forms:
    • Males
    • Yellow form females
    • Dark form females
  • Above:
    • Males and yellow form females are yellow butterflies and have black tiger stripes on their forewings.
    • Dark form females have dark forewings that may or may not show faint black tiger stripes.
    • Both yellow and black form females have more blue scaling on their wings than males.
  • Below:
    • Males and yellow form females have black tiger stripes on their forewings.
    • Dark form females have dark forewings that may or may not show faint black tiger stripes.
  • Each hind wing has a long tail.
  • Dark form females resemble a cousin swallowtail species, the Pipevine Swallowtail (Battus philenor).
    • Pipevine Swallowtail butterflies are extremely toxic to predators; most butterfly predators actively avoid attacking them.
    • Dark-morph Eastern Tiger Swallowtail butterflies likely gain protection from predators by mimicking their smaller, dangerous cousin.

How To Find Eastern Tiger Swallowtail Butterflies

  • Eastern Tiger Swallowtail butterflies are among the easiest species to spot in the wild thanks to their large size, abundance, and preference for nectar from a huge variety of wild and cultivated flowers.
  • Flight Season: Late March to late October.
  • Eastern Tiger Swallowtail butterflies are “edge habitat specialists”. Look for them in the areas between meadows and forests.
    • More individuals are likely to be along the edges of flowery meadows and forests at any given time of day (Siu et al. 2016) than deep in either area.
  • These yellow butterflies are strong fliers and fly higher than many other butterflies.
    • When spooked, Eastern Tiger Swallowtail butterflies fly towards the woods and up into the trees to hide amongst the canopy.
  • Adult Eastern Tiger Swallowtail butterflies eat nectar from flowers with long petals and seem to prefer red, pink, and purple flowers (Daniels 2003).
    • North Carolina wildflowers that serve as nectar sources for this species include:
      • Butter Milkweed (Asclepias tuberosa)
      • Common Milkweed (Asclepias syriaca)
      • Wild Lupine (Lupinus perennis)
  • Other flowers from which they feed include:
    • Wild Bergamot (Monarda stulosa)
    • Hairy Beardtongue (Penstemone hirutus)
    • Dwarf Blazing Star (Liatris cylandracea)
    • Winter Vetch (Vicia villosa)
    • Clovers (Trifolium spp.)
    • Bouncing Bet (Saponaria oficianalis)

Eastern Tiger Swallowtail Butterfly Classification

Phylum

Arthropoda

Class

Insecta

Order

Lepidoptera

Family

Papilionidae (Swallowtail and Parnassian Butterflies)

Genus

Papilio

Species

P. glaucus

Binomial Name

Papilio glaucus

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Christine
Christine is the creator and author of NowIWonder.com, a website dedicated to the animals and plants that share our world, and the science that helps us understand them. Inspired by lifelong exploration and learning, Christine loves to share her knowledge with others who want to connect with wild faces and wild spaces.

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