Papilio anchisiades

Esper, 1788

ruby-spotted swallowtail, red-spotted swallowtail

Papilio anchisiades is a to large with a wingspan of 70–100 mm, distributed from southern Texas through Central America to Argentina. The exhibits considerable geographic variation across its range, with multiple recognized . feed on Rutaceae, particularly Citrus species, and are commonly observed drinking at moist ground near rivers rather than in forested .

Papilio anchisiades 10zz by Photo by David J. Stang. Used under a CC BY-SA 4.0 license.

Papilio anchisiades, Houston Museum of Natural Science by FreeMediaKid!. Used under a CC BY 4.0 license.

Papilio anchisiades by Anne Toal from US. Used under a CC BY 2.0 license.

Pronunciation

How to pronounce Papilio anchisiades: //pəˈpɪlioʊ ænˈkaɪsiˌeɪdiːz//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from similar swallowtails by the reduced or absent tail on the (except in some females), and by the arrangement of red spots on the hindwing underside in two rows that are partly contiguous. The idaeus has a distinct spot at the end of the , while capys lacks white spots on the forewing upperside entirely. The variable white spotting pattern on the forewing separates anchisiades from the more uniformly marked capys form.

Images

Habitat

Not a forest . are fond of drinking at moist places on banks of rivers. are often found on cultivated Citrus and related Rutaceae in open or semi-open .

Distribution

Southern Texas south through Mexico and Central America to Panama; South America from Colombia, Venezuela, and the Guianas south to Peru, Bolivia, Brazil, Paraguay, and Argentina. Rare strays recorded in Kansas, southeastern Arizona, and western Texas.

Diet

feed on various Rutaceae, including Citrus, Casimiroa, and Zanthoxylum . feed on flower nectar.

Host Associations

Citrus sinensis - larval Survival lower than on C. reticulata when reared individually; survival increased when multiple larvae reared together
Citrus reticulata - larval Greater larval survival than on C. sinensis under individual rearing conditions
Casimiroa - larval
Zanthoxylum - larval

Life Cycle

with , , , and stages. Larvae often rest together in hundreds on stems of Citrus. Developmental timing varies by : longevity decreases on Citrus sinensis when multiple larvae are reared together, while survival increases; on C. reticulata, survival remains stable under similar conditions.

Behavior

exhibit gregarious resting , often aggregating in large numbers on stems. engage in behavior, gathering at moist ground near riverbanks to drink. Not a forest-dwelling ; adults are active in open and riparian .

Ecological Role

serve as when feeding on flower nectar. function as on Rutaceae, with potential economic impact on cultivated citrus. The has been evaluated as a candidate for sustainable farming in .

Human Relevance

can occur in large numbers on cultivated Citrus, potentially causing . The has been explored as an economically viable candidate for farming in the Peña Roja of the Colombian Amazon, where it was found to be biologically, economically, and socially sustainable for commercial purposes. are sought after by butterfly and for live butterfly exhibits.

Similar Taxa

Papilio thoasSimilar size and coloration, but P. anchisiades lacks the prominent tail and has distinctive red spot arrangement on
Papilio cresphontesBoth large with spotted , but P. cresphontes has more extensive banding and different spot pattern

More Details

Subspecies

Five recognized : P. a. anchisiades (Venezuela, Colombia to Guianas, Peru); P. a. capys (Bolivia to Paraná, Argentina, Paraguay, Brazil); P. a. idaeus (Texas, Mexico to Panama); P. a. lamasi (Ecuador); P. a. philastrius (Trinidad). The ruby-spotted swallowtail name applies primarily to the idaeus subspecies.

Etymology

The specific epithet anchisiades follows Classical tradition, referring to the Graeco-Roman Anchisiades.

Farming viability

Research in Colombian Amazon found survival rates and compatibility sufficient for commercial farming, with higher survival on Citrus reticulata than C. sinensis under individual rearing, though group rearing improved outcomes on C. sinensis.