1/2-3/4" (13-19 mm). Tiny. Male uniform brown above, female reddish; blue absent or merely a dusting. Below, gray-brown with dark fringes and little or no white at base; blue and black spots
on HW margin; white striations across wings.
Western Pygmy-blue has whitish fringes, bases of wings whitish on underside; ranges usually do not overlap.
Pale greenish caterpillar feeds on the salt marsh plants, glasswort (Salicornia) and saltwort (Batis).
Multiple broods; peaking in February, April, June, and September.
Salt marshes and tidal flats.
Coastal Alabama, Georgia, and Florida.
The smallest eastern butterfly is not as widespread as its western counterpart, lacking the strong emigratory and colonizing tendency of the Western Pygmy-blue. At times it is rare or nearly absent, then suddenly for a short while this species becomes very common. This blue hugs the coastline, flying low and slowly over its salty habitat.