Fortunately in America, there is only one species of the genus Biston - Biston betularia, and its two subspecies. After identifying Peppered Moths in America for a while, I was thinking of branching out to other species in the Tribe Bistonini. I noticed on Lycia ypsilon that it looks like European …

Have you tried opening your favorite new book on the Bistonini and flipping to the Phigalia section?

Thanks for the tip. Yes, I have. But the differences appear very subtle in the iNaturalist pictures, which can appear different based on the light. I guess I just need to practice more. Was Phigalia the most difficult group for you to distinguish between the various species?

How to tell the differences between species in the genus Phigalia found in America?

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How to tell the differences between species in the genus Phigalia found in America?

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