Distinguishable from Anna Blue - Plebejus anna only by more easterly distribution. From other blues by (usually) some marginal orange on ventral hind and front wings. No obvious dark spot on middle of upper front wings of males. In most regions where found, underside tending to bluish gray. Can be very similar to mostly more southern and lowland Melissa Blue - Plebejus melissa (and its segregates), which tends to be slightly grayish or brownish below with markings all more bold and contrasting, and female usually with prominent marginal orange band on all four wings (commonly narrower if present on P. ida).
Northern North America east of Cascades, mostly north of southern Canadian border, lapping into U.S. mostly near Great Lakes, and south to Colorado along high elevation Rocky Mountains. Replaced by P. anna in Cascades and California Sierras west to coast.
New Brunswick; Cape Breton Island, Nova Scotia (AWT)
North America as well as Europe and Asia.
Bay of Fundy coastal bogs in NB; Upland bogs in CBI.
Ericaceae in the east; legumes of the pea family (Fabaceae) in the west.
In the afterword to Lolita
, Vladimir Nabokov mentions that he caught the first known female of Lycaeides sublivens
Nabokov on the mountain trail he used as the setting for the book's final scene. This butterfly is now considered a subspecies of Plebejus idas
according to this page