Red-bodied swallowtails or ruby swallowtail ( due to the color ) are butterflies in the swallowtail family, that belong to the genera Atrophaneura, Byasa, Losaria, or Pachliopta. They are generally found in Asia (Indomalayan realm). Collectors have found the red-bodied swallowtails difficult to kill. Pinching the thorax, a method which kills most butterflies, is withstood and apparently only stuns the butterfly temporarily.

The eggs are simple. The larvae resemble those of other Troidini. Fleshy spine-like tubercles, often with red tips, line the caterpillars' backs, and their bodies are dark red to brown and velvety black or shades of grey with a pattern of black lines. They feed on species of Aristolochia and Thottea. Chrysalids are camouflaged to look like a dead leaf or twig. They are attached by a girdle and an anal pad. Adults are nectar feeding. Many species of red-bodied swallowtails show aposematism, and serve as models for Batesian mimicry. The biology of Pachliopta hector and Pachliopta aristolochiae are well studied.

Species limits may be either narrow (many species - forma and subspecies raised to full or "good" species) or broad (fewer species - rank reduction) see Jürgen Haffer for a discussion.

Listed alphabetically within genera: genus: Atrophaneura Reakirt, [1865] (earlier considered as subgenus Atrophaneura but now raised to genus level) genus: Byasa Moore, 1882 (earlier considered as subgenus Byasa but now raised to genus level) genus: Losaria Moore, [1902] (earlier considered as subgenus Losaria but now raised to genus level) genus: Pachliopta Reakirt, [1865] (earlier considered as subgenus Pachliopta but now raised to genus level) - Atrophaneura aidoneus (Doubleday, 1845) — lesser batwing - Atrophaneura dixoni (Grose-Smith, 1900) - Atrophaneura horishana (Matsumura, 1910) — aurora swallowtail - Atrophaneura kuehni (Honrath, 1886) - Atrophaneura luchti (Roepke, 1935) - Atrophaneura nox (Swainson, 1822) — Malayan batwing - Atrophaneura priapus (Boisduval, 1836) — Priapus batwing - Atrophaneura semperi (C. & R. Felder, 1861) - Atrophaneura schadenbergi (Semper, 1891) - Atrophaneura sycorax (Grose-Smith, 1885) - Atrophaneura varuna (White, 1842) — common batwing - Atrophaneura zaleucus (Hewitson, [1865]) - Byasa adamsoni (Grose-Smith, 1886) — Adamson's rose - Byasa alcinous (Klug, 1836) — Chinese windmill - Byasa crassipes (Oberthür, 1893) — black windmill - Byasa daemonius (Alphéraky, 1895) - Byasa dasarada (Moore, 1857) — great windmill - Byasa hedistus (Jordan, 1928) - Byasa impediens (Rothschild, 1895) - Byasa laos (Riley & Godfrey, 1921) - Byasa latreillei (Donovan, 1826) — rose windmill - Byasa mencius (C. & R. Felder, 1862) - Byasa nevilli (Wood-Mason, 1882) — Nevill's windmill - Byasa plutonius (Oberthür, 1876) — Chinese windmill - Byasa polla (de Nicéville, 1897) — De Niceville's windmill - Byasa polyeuctes (Doubleday, 1842) — common windmill - Byasa rhadinus (Jordan, 1928) - Losaria coon (Fabricius, 1793) — common clubtail - Losaria palu (Martin, 1912) — Palu swallowtail - has been regarded a subspecies of A. coon - Losaria rhodifer (Butler, 1876) — Andaman clubtail - Losaria neptunus (Guérin-Méneville, 1840) — yellow-bodied club-tail or yellow club-tail - Pachliopta adamas (Zinken, 1831) - Pachliopta aristolochiae (Fabricius, 1775) — common rose - Pachliopta antiphus (Fabricius, 1793) - Pachliopta atropos (Staudinger, 1888) - Pachliopta hector (Linnaeus, 1758) — crimson rose - Pachliopta jophon (Gray, [1853]) — Ceylon rose or Sri Lankan rose - Pachliopta kotzebuea (Eschscholtz, 1821) — pink rose - Pachliopta leytensis (Murayama, 1978) - Pachliopta liris (Godart, 1819) - Pachliopta mariae (Semper, 1878) - Pachliopta oreon (Doherty, 1891) - Pachliopta pandiyana (Moore, 1881) — Malabar rose - Pachliopta phlegon (C. & R. Felder, 1864) - Pachliopta polydorus (Linnaeus, 1763) — red-bodied swallowtail - Pachliopta polyphontes (Boisduval, 1836) - Pachliopta strandi (Bryk, 1930)