Isabella's Heliconian (Eueides isabella [Stoll] Wing span: 3 1/16 - 3 1/2 inches (7.8 - 9 cm). Identification: Forewing elongated with rounded apex. Wings similar above and below. Apical half of forewing black with yellow areas; basal half orange with a black stripe. Hindwing orange with 2 black stripes; white dots along the black outer margin. Life history: Males patrol for receptive females, who may mate more than once. Eggs are laid singly on tendrils or on underside of host plant leaves; caterpillars then feed on those parts of the plant. Adults roost alone on underside of leaves. Flight: April-July in Texas, throughout the year in the tropics. Caterpillar hosts: Passion-vines (Passiflora species). Adult food: Flower nectar. Habitat: Subtropical woodland edges, scrub, and brushy fields. Range: Brazil north to Mexico and the West Indies; periodic immigrant to central Texas, Kansas, New Mexico, and Arizona.