Wild Facts About The Gulf Fritillary Butterfly
How To Identify Gulf Fritillary Butterflies
Adult Butterflies
- Gulf Fritillary butterflies are large bright orange butterflies with wingspans up to 3.8 inches (9.7 cm) and orange and white bodies and eyes.
- Above:
- Bright orange wings
- Three black-ringed white spots on forewing.
- Black, chained markings along hind wing margin.
- Below:
- Pale brown-orange overall.
- Many silvery, tear-drop-shaped patches.
- These brilliant, shiny silver spots give this species’ its other common name “Espejitos”, or “little mirrors”.
- Gulf Fritillary butterflies live in the southernmost part of the eastern United States.
- They disperse north as far as North Carolina and Tennessee in the summer months.
- Look for them in home gardens, roadsides, utility easements, old fields, and disturbed areas.
- They are especially common anywhere Lantana plants grow, as Gulf Fritillaries seem to really love the nectar produced by flowers in this genus.
- They disperse north as far as North Carolina and Tennessee in the summer months.
Caterpillars
- The larvae of Gulf Fritillary caterpillars grow to approximately 1.8 inches (4.5 cm) and have:
- Shiny, bright orange or red-orange bodies,
- Long, shiny black spines,
- Heads that are orange on top and black on bottom,
- Shiny black thoracic legs.
- Look for Gulf Fritillary caterpillars anywhere Passion Flower plants grow (genus Passiflora).
Chrysalises
- Gulf Fritillary chrysalises dangle from twigs and resemble bird droppings and dead, brown, dried up leaves.
Score One For Body Odor
- Both male and female Gulf Fritillary butterflies produce a strong, unpleasant odor when disturbed.
- They manufacture the chemicals that form the odor in special glands located in their abdomens.
- In females, the spherical, bright yellow scent glands are located between abdominal segments seven and eight.
- Normally hidden from sight, female Gulf Fritillaries evert the organs when threatened.
- In males, the scent glands are located within the claspers on the tips of their abdomens.
- The scent glands become visible when male Gulf Fritillary butterflies extend their claspers.
- In females, the spherical, bright yellow scent glands are located between abdominal segments seven and eight.
- The chemicals that Gulf Fritillary butterflies produce smell acrid and are apparently very effective at deterring insectivorous birds.
- A study that researched the chemical makeup of the defensive fluid found:
- No observed predation of adult Gulf Fritillaries confined to a butterfly house over a period of nine months, despite the presence of aggressive butterfly-eating avian predators such as the superb starling.
- No observed predation or evidence of predation of adult Gulf Fritillary butterflies in an outdoor butterfly garden by either vertebrate or invertebrate predators (Ross et al. 2001, https://doi.org/10.1023/A:1010372114144).
- A study that researched the chemical makeup of the defensive fluid found:
Silver, Silver, Shining Bright
- The bright silver spots on the underside of Gulf Fritillary butterfly wings are striking, beautiful, and special.
- Butterfly wings are covered in tiny scales that lay along the wing, overlapped like shingles on a roof.
- The structure and color of these scales determine the visible color and patterns seen on butterfly wings.
- In the case of Gulf Fritillaries, the scales that cause the metallic silver shine are special because they shine brightly regardless of the angle at which the wings are held.
- According to researchers who analyzed the optical properties of the Gulf Fritillary’s silvery wing spots, “…the reflection spectra are quite broadband in the visible range. The reflection increases continuously from about 50% at lower wavelength in the ultraviolet to more than 90% in the infrared. The overall spectra change only slightly during the rotation of the wing from flat (0°) to 40°.” (Dolinko et al. 2021, https://doi.org/10.1038/s41598-021-98237-9).
- No matter which way you look at them, Gulf Fritillary butterflies stay beautiful.
Gulf Fritillaries Need To Start Off Strong
- Like many butterfly species, Gulf Fritillary butterflies feed on flower nectar for energy to fuel their flights and reproductive activities.
- But flower nectar provides only a portion of the energy they need.
- Much of the energy adult Gulf Fritillaries need comes from stores of lipids that the pupae set aside during metamorphosis.
- Gulf Fritillaries emerge from pupae with 13-16% of dry mass allocated to lipids, and those lipid stores deplete as the butterflies age.
- Compared to another common eastern butterfly, Cloudless Sulphur Butterfly (Phoebis sennae), Gulf Fritillaries also:
- Visited less energetically rewarding flowers (there was a nearly 250-fold variation in nectar volume between least and most rewarding flowers studied and a sugar concentration range of 17.1 to 40.4%),
- Received less energetic profit from their foraging work,
- Switched flower types more often (May 1992, https://doi.org/10.2307/1941466).
- This likely means that Gulf Fritillary caterpillars are under significant selection pressure to feed well and store as much energy as they can while they have a chance.
- Once they pupate into adult butterflies, they must rely more heavily on their stored energy rather than the energy they can acquire from flower nectar.
Scientific Classification
|
Kingdom |
Animalia (animals) |
|
Phylum |
Arthropoda (arthropods) |
|
Class |
Insecta (insects) |
|
Order |
Lepidoptera (butterflies and moths) |
|
Family |
Nymphalidae (brush-footed butterflies) |
|
Genus |
Agraulis (formerly Dione) |
|
Species |
A. vanillae (formerly D. vanillae) |
Scientific Name |
Agraulis vanillae (formerly Dione vanillae) |
Gulf Fritillary Butterfly Photo Gallery
- Gulf Fritillary Butterfly. Dione vanillae. Orange butterfly. Insect. Photograph taken and design created by the author. Copyright © 2025 Now I Wonder. All rights reserved.
Gulf Fritillary Butterfly. Dione vanillae. Orange butterfly. Insect. Photograph taken and design created by the author. Copyright © 2025 Now I Wonder. All rights reserved.- Gulf Fritillary Butterfly. Dione vanillae. Orange butterfly. Insect. Photograph taken and design created by the author. Copyright © 2025 Now I Wonder. All rights reserved.
- Gulf Fritillary Butterfly. Dione vanillae. Orange butterfly. Insect. Photograph taken and design created by the author. Copyright © 2025 Now I Wonder. All rights reserved.
- Gulf Fritillary Butterfly. Dione vanillae. Orange butterfly. Insect. Photograph taken and design created by the author. Copyright © 2025 Now I Wonder. All rights reserved.
- Gulf Fritillary Butterfly. Dione vanillae. Orange butterfly. Insect. Photograph taken and design created by the author. Copyright © 2025 Now I Wonder. All rights reserved.
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