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1. any of various butterflies of the genus Papilio and related genera, esp P. machaon of Europe, having a tail-like extension of each hind wing: family Papilionidae
2. the forked tail of a swallow or similar bird



(Papilio machaon) a butterfly of the family Papilionidae. The swallowtail is yellow with black markings. Its wingspread reaches 9 cm. It is found in Europe and the temperate regions of Asia and northern Africa, emerging at the beginning of summer and, in southern regions, at the end of summer (the second generation). It winters in the pupal stage. The caterpillar is green with black cross stripes and orange-yellow spots. It develops on plants of the families Umbelliferae and Rutaceae. It feeds on carrots, but damage is usually insignificant.

References in periodicals archive ?
Hybridization between two species of swallowtails, meiosis mechanism, and the genesis of gynandromorphs.
Two of the yellow and black species, the Canadian Tiger Swallowtail (Papilio glaucus canadensis) and the Old World Swallowtail (Papilio machaon) commonly occur in all three prairie provinces.
The pattern of pollen wafting from Bt corn variety Pioneer 34R07 showed no relationship to the pattern of deaths among black swallowtail caterpillars on nearby wild plants, report C.
California Dutchman's pipe (Aristolochia california) is a native vine and the food plant of the coal black pipe-vine swallowtail.
Caption: The butterfly habitat at Hood's Do it Best Hardware in Wyandotte, Michigan, takes monarch and black swallowtail butterflies from their early caterpillar stage (top left) to full maturation (bottom left).
Description: They are commonly known as black swallowtail butterfly, forewings, generally they are black in appearance, forewings are completely black with light yellow streaks making a thin band on upper side.
Australia Post's latest stamp issue celebrates four spectacular Australian butterfly species: the Pale Triangle (Graphium eurypylus), the Bordered Rustic (Cupha prosope), the Cairns Birdwing (Ornithoptera euphorion) and the Chequered Swallowtail (Papilio demoleus).
Species such as the continental swallowtail and the large tortoiseshell were all seen in Britain in 2014, following an unprecedented series of immigration and emergence of exotic butterflies.
Among those identified at the festival this year were black swallowtails, two of which were seen when Darlene O'Connor of Rutland led a walk with about 20 adults and children along trails down to Broad Meadow Brook.
Like most other swallowtails, they feed on citrus trees, although they also have their natural food plants, which include Clausena anisata, Zanthoxylum capense, Zanthoxylum delagoense, and Calodendrum capense.
The greenhouse is filled with monarchs, swallowtails, and painted ladies, plus all the plants that attract them.
2011) estimated that the divergence of the parental swallowtails (P.