Superfamily Papilionoidea (Butterflies and Skippers)
Family Pieridae (Whites, Sulphurs, Yellows)
Subfamily Coliadinae (Sulphurs and Yellows)
All Colias species are migratory in behaviour. Some simply move up and down mountainsides as the seasons advance, to take advantage of fresh growth of their larval foodplants and adult nectar sources. Others undertake much longer migrations.
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