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Butterflies of Mexico, USA & Canada
Reakirt's Blue
Echinargus isola  REAKIRT, 1867
Family - LYCAENIDAE
subfamily - POLYOMMATINAE
Tribe - POLYOMMATINI
Echinargus isola, Sycamore Canyon, Arizona, USA   Frank Model
Introduction
The genus Echinargus comprises of a single species - isola.
This butterfly was formerly placed in the genus Hemiargus. The male has an iridescent violet-blue upperside, with narrow brown margins and a pair of prominent black spots at the tornus. In the female the blue scaling is confined to the basal area of the wings.
Echinargus isola is a resident breeding species in Mexico, California, Arizona and Texas. It occurs as a migrant as far north as southern Saskatchewan.
Habitats
This species is found in prairies, deserts, meadows and fields; and in large glades and clearings in deciduous and coniferous woodlands.
Lifecycle
The eggs are laid singly on the flowerbuds of Acacia, Albizzia, Astragalus, Desmanthus, Glycyrrhiza, Dalea, Indigofera, Lotus, Medicago, Mimosa, Prosopis and Trifolium ( Fabaceae ). The larvae eat the flowers and seeds, and are attended by ants which milk them for sugary secretions.
Adult behaviour
Males patrol in search of females. Both sexes nectar at a wide range of flowers.
 

 

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