Insects · La Saladita, Guerrero

West-Mexican Swallowtail

Battus eracon

Spanish: Mariposa cola de golondrina occidental

Battus eracon, the west-Mexican swallowtail or Colima swallowtail, is a species of butterfly in the family Papilionidae. It is found in western Mexico where it is local and uncommon. The larvae feed on Aristolochia tentaculata.

TaxonomyInsecta › Lepidoptera › Papilionidae

Local records10 research-grade observations within about 50 km of La Saladita (the survey box also takes in Zihuatanejo, Ixtapa and Troncones)

Global records20 on iNaturalist

Most recent records2020 – 2025

Months of the 8 most recent records

JanFebMarAprMayJunJulAugSepOctNovDec

Recent local sightings

2025-12-26 — observation by santiagob1986
2025-11-07 — observation by antonio_perez2
2025-07-16 — observation by filibertorumbo
2025-01-16 — observation by zihuadean
2025-01-13 — observation by zihuadean
2022-12-23 — observation by zihuadean

Interactive card with more photos, sounds and similar species Insects guide iNaturalist Wikipedia

Cite as: “West-Mexican Swallowtail (Battus eracon) at La Saladita”, La Saladita Field Guide, lasaladita.com/species/battus-eracon/, updated 2026-09-26. Observation counts and months come from iNaturalist research-grade records within about 50 km of 17.8375°N, 101.7606°W (the survey box also takes in Zihuatanejo, Ixtapa and Troncones); summary text from Wikipedia where present.