The Io moth, named for a character in Greek mythology, has a very obvious black eyespot on each hindwing. Males are golden yellow in color, but females are more brown. It has a wingspan of 2.5-3.5 inches. In Canada and northern states, the io moth produces only one brood a year. Farther south in the United States, they sometimes produce two broods a year, depending on springtime weather. Adults emerge and fly in late April to May and then again July and August. In the Florida Keys and southern Texas there are three to four broods a year. Both sexes are attracted to lights and fly when air temperatures are higher than 45 F or 7 C, but males appear much more often than females.