Butterflies - Differences between Colias Croceus and Colias Hyale
COLORATION:
Colias Croceus: Yellow. The female has a white variation.
Colias Hyale: Pale yellow the male, white the female.
BLACK BANDS ON THE HINDWING UPPERSIDE:
Colias Croceus: Large.
Colias Hyale: Narrow.
Pictures from www.lepidoptera.eu