Celastrina lucia

Celastrina lucia, the lucia azure, northern azure,  eastern spring azure or northern spring azure, is a species of butterfly of the family Lycaenidae. It is found eastern North America, ranging from the Maritimes south through the Appalachian Mountains to West Virginia.

The wingspan is between 22–35 mm. Adults are sexually dimorphic. They are on wing from April to July.

The larvae feed on Vaccinium species, including V. pallidum.

Taxonomy
Until the early 1990s, most North American azures were thought to be a single species, Celastrina ladon. More recently, research has revealed that there are many different species of azures, including C. lucia, which had been treated as a subspecies of C. ladon.

Similar species

 * Cherry gall azure (C. serotina)
 * Holly azure (C. idella)
 * Spring azure (C. ladon)
 * Summer azure (C. neglecta)