Species Detail

Julia Heliconian

Dryas iulia (Fabricius, 1775)

JPG -- species photo

Attributes of Dryas iulia


Family: Brush-footed Butterflies (Nymphalidae)

Subfamily: Longwings (Heliconiinae)

Identification: Forewings elongate. Male bright orange above and below; upperside of hindwing with narrow black border on outer margin. Female duller orange, with more black markings above.

Life history: Males patrol all day for receptive females. Eggs are laid singly on new growth; caterpillars feed on leaves. Adults forage along a set route of nectar sources each day in a behavior known as "trap-lining".

Flight: Throughout the year in southern Florida and South Texas, strays to the north in summer.

Wing span: 3 1/4 - 3 5/8 inches (8.2 - 9.2 cm).

Caterpillar hosts: Passion-vines including Passiflora lutea in Texas.

Adult food: Nectar from flowers including lantana and shepherd\'s needle; probably others.

Habitat: Subtropical hammock openings and edges, and nearby fields.

Range: Resident in Brazil north through Central America, Mexico, West Indies, peninsular Florida, and South Texas. Strays north to eastern Nebraska.

Conservation: Not usually required, but habitat in South Texas is limited.

NatureServe Global Status: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.

Management needs: None reported.

Documented Records for Dryas iulia



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