Gulf Fritillary

The Gulf Fritillary or Passion Butterfly, Agraulis vanillae, is a striking, bright orange butterfly of the family Nymphalidae, subfamily Heliconiinae. These were formerly classified in a separate family, the Heliconiidae or longwing butterflies, and like other longwings this species does have long, rather narrow wings in comparison with other butterflies. It is not closely related to the true fritillaries. It is a medium to large butterfly, with a wingspan of 6–9.5 cm (2.4–3.7 in). Its underwings are buff, with large silvery spots. It takes its name from migrating flights of the butterflies sometimes seen over the Gulf of Mexico.