The Eacles genus is restricted to the Americas. One species, Eacles imperialis, occurs from Canada south into South America. The others have a a more limited distribution. The 31 species are all large moths, many of them quite similar looking. Especially the females can be difficult to identify.
Eacles imperialis is a very popular species among hobbyist breeders. They are spectacular and easy to rear, which makes them suitable for all levels of experience. The other species are not necessarily more difficult, however can be slightly more challenging especially when eggs are obtained during winter months.