The luna moth has a wingspan of 7.5 to 10.5 cm. The wings are lime-green. The bottom wings have long tails. There is a clear spot on each wing. There is a reddish-brown border on the top edge of the top wing. Some individuals have pinkish borders on the outer edge of both wings. Other individuals have yellowish borders instead. Adult Luna Moths have no mouth at all, rendering them completely harmless. They live by the fat they stored up at the larval stage. Because of this, they only live for about one week.