One of the scarcest and least-known butterflies in California, found erratically in glades in mesic forest on the Sierran mid-West slope and (more commonly) in the Trinity Alps of northwestern California. We know extremely little of its biology. One brood, May-July. Host plants presumably Fabaceae. Because this is so similar to the relatively common, widespread Northern Cloudy-Wing, T. pylades, and overlaps it at the upper end of pylades' altitudinal taxon range, it may be overlooked regularly. Watch for it!

Found on and at the margins of wet meadows at and above Lang, extending above tree-line. Males may hilltop, and also puddle. Numbers of this species vary greatly among years; occasionally very common, usually not. It sits with the wings mostly or fully opened. Visits clovers, vetches, and Pink Pussy Paws eagerly. One brood, May-July; hosts clovers (Trifolium).

A generally uncommon skipper of canyon-riparian and mesic habitats, from the foothills to 5000'. It sits with the wings only partly open, unlike most of its relatives. A strong flier but regularly seen at flowers, including Dogbane, Yerba Santa, Brodieas, California Buckeye, and Vetches; not much of a puddler. One brood in late spring (mid March-July, depending on altitude). Host plants: Fabaceae, especially the robust perennial Lotus crassifolius; native Lathyrus; Psoralea; possibly on Astragalus, but not recorded in our area.