This is one of two species I find very difficult
to separate - the other one is the Shepherd's Fritillary, C. pales.
There are another 2 very similar species (Balkan and Cranberry
Fritillaries, B. graeca and B. aquilonaris) that further
confuse the situation but these are both relatively uncommon where they
overlap and can be readily separated. See the table for B.
graeca for more information on all 4 species.
of napaea are instantly recognisable by the violet mauve sheen
that covers the uppersides. Specimens without this sheen need closer
inspection for proper identification. To separate napaea and pales
it is first necessary to note where they were found. Their ranges only
overlap in the eastern Pyrenees and the Alps.
Underside forewing black markings
clearly marked black
In the Alps:
Two rows of submarginal spots
start converging from space 4
To me it seems the spot of the inner row in
space 4 is displaced outwards making it look like the rows start
Upper forewing black discal markings
This feature is variable and I'm not always
convinced it holds true
yellow, better defined
reddish, markings blended or smudged
Subjective test but may help when other