Butterflies of the
Amazon and Andes
Family - LYCAENIDAE
Hemiargus hanno hanno, Rio Tambo, Peru ©
About 120 members of the cosmopolitan subfamily Polyommatinae occur
in the neotropical region. Most are confined to the temperate
grasslands of the high Andes, although a few species occur at much
The exact number of Hemiargus species
is uncertain due to differing opinions about the taxonomic rank of
various races of hanno. Lamas only
recognises 2 Hemiargus species i.e.
hanno and ramon;
and lists ceraunus,
hanno, astenidas and
bogotana as subspecies of
hanno. The latest research seems to
indicate however that there are at least 6 species i.e.
and another currently unnamed species from Peru.
Hemiargus hanno is the commonest and
most widespread species. It probably occurs over most of the
tropical and sub-tropical areas of mainland South America, although
its exact range is unknown due to frequent confusion with other
This species is found in disturbed dry grassy habitats throughout
tropical and subtropical areas, at altitudes between sea level and
about 1500m. It is most often seen on scrubby grassland, but can
also be found along roadsides or clearings in severely disturbed
To be completed.
Hanno Blues are active only in hot sunshine, at which time large
numbers can be found flying in open dry grassy areas.
Hemiargus hanno bogotana,
Santa Fe de Antioquoia, Colombia ©