On Aug 16, 2006, Magpye from NW Qtr, AR (Zone 6a) wrote:
Identification: Large black swallowtail with spatulate tails and a distinct central yellow band on each wing.
Life history: Not reported.
Flight: February to November.
Wing span: 5-7 inches (12-15 cm).
Caterpillar hosts: Avocado and magnolia.
Adult food: Wild fuchsia in Costa Rica.
Habitat: City gardens, cloud forests.
Range: Central Mexico south to Costa Rica. Rare stray to Texas.