About Heliconius erato (Linnaeus, 1758)
Heliconius erato, commonly called the red postman, is one of around 40 neotropical butterfly species in the genus Heliconius. Additional common names for this species include the small postman, the red passion flower butterfly, and the crimson-patched longwing. It was formally described by Carl Linnaeus in the 10th edition of his work Systema Naturae, published in 1758. H. erato displays Müllerian mimicry with other Heliconius butterflies, most notably Heliconius melpomene, to warn shared predators against attacking it. This mimicry contributes to the species’ unusual longevity. It also has a distinctive mating ritual where males transfer anti-aphrodisiacs to females. Its host plants are multiple vine species in the passion flower genus Passiflora. Recent field work has confirmed that this butterfly is relatively abundant in its range. H. erato is a neotropical species that occurs from southern Texas in the United States south to northern Argentina and Paraguay. It inhabits the edges of tropical rainforests. The species is philopatric, meaning it maintains an unusually restricted home range. In high-density populations in Trinidad, adjacent home ranges may be only 30 yards apart, but H. erato very rarely moves into neighboring home ranges. In the wild, the red postman has been observed to live for a minimum of 20 days. In captivity, individuals live for more than one month, with the maximum recorded lifespan reaching 186 days. This lifespan is considerably longer than that of other temperate and tropical butterflies, which typically survive no longer than a month in captivity. H. erato’s longevity is attributed to its favorable benign climate, its confirmed unpalatability to predators, and the nutritional benefits it gains from digesting pollen.
