What is "swallowtails"

Usage examples of "swallowtails".

The Frontier Bar was still closed: butterflies danced nervously in the air, zigzagging across the road, and on the other side of the dirt area some big yellow swallowtails were sucking nectar from flowering lilacs beside the Pilar Cafe.

Felsner removed his fingers from the cone of green light and only then showed his guests his swallowtails, tattered on the sides and in back.

Hardly a moment after Eddi Amsel had unwrapped him self from black cloth viscera, disclosing the easygoing and old-familiar Amsel in the flowing green light of the music room, he neatly folded his equipment, took the half-frightened, half-amused Jenny by her plump little hand, and, carrying away the Imbsian swallowtails, left the pianist and his goldfish.