- Family: Brushfooted Butterflies (Four-footed Butterflies) – Nymphalidae
- Subfamily: Heliconians (Longwings) – Heliconiinae
- Wing span: Medium-sized–large, 47–65 mm (1.83–2.54 in.). Females usually larger than males.
- Wing upper side: Orange with black blotches. Tip of leading edge of female’s forewing with hard-to-see white blotch nearby.
- Wing underside: Forewing orangey brown with black blotches. Base of hind wing pale yellow with narrow brown stripes. Different shades of brownish violet close to margins. Thin band of white blotches separating margin from basal part of wing.
- Habitat: Damp meadows and forest margins.
- Flying time: End-July–mid-August.
- Overwintering form: Semi-grown caterpillar.
- Larval foodplant: Violets and pansies (Viola sp.).
Pallas’ fritillary is mainly found in Finland as a wanderer, and the population can survive in southernmost parts of the country after a year or two of wandering (a so-called temporary stay). The rare species can be differentiated from other larger Heliconians by the way that its hind wings are divided in two by colour. Additionally, there is quite a small white blotch close to the apex of the female’s forewing, which sets it apart from other Heliconians.