Reasonably common across France, and commonly found at altitude, often in great numbers. The upperside can be differentiated from the High Brown Fritillary (A. adippe) by the indicators described on the adippe page.

The upperside can be differentiated from the Niobe Fritillary (A. niobe) by the rather heavier marginal marks on both upf and unh of aglaja compared to niobe.

The undersides of each of the three species are quite different and easily distinguishable.

In some textbooks aglaja is spelt aglaia.

observations

a male puddling, the forewings held back in a pose that seems normal for aglaia when puddling. The orange seems rather dull compared to others on this page, but it is not clear whether this is natural or just the result of wear.

a very fresh male, puddling.

a male, based on the lighter markings, the albeit quite light sex brands on v2 and v3, and the just-visible body. Not 100% certain, though.

 a female as indicated by the heavier markings and confirmed by the absence of sex brands.

an old photo of a very heavily marked and suffused female. It actually looked like this in real life. I have seen females like this on a few subsequent occasions.

 a male puddling.

a male puddling, another attempt to catch the beautiful green colouring, but the light was rather too bright.