Depending on the region they're in (in terms of seasonal temperature that allows them to have more/less breeding cycles in a given year), luna moths can have some slight color variation. The ones hatched closer to wintertime are a little "bluer" and they are more green the further you get into spring and summertime :0 IIRC, color is also a trait of their sexual dimorphism; males are typically a slightly lighter shade
Depending on the region they're in (in terms of seasonal temperature that allows them to have more/less breeding cycles in a given year), luna moths can have some slight color variation. The ones hatched closer to wintertime are a little "bluer" and they are more green the further you get into spring and summertime :0 IIRC, color is also a trait of their sexual dimorphism; males are typically a slightly lighter shade