bright bands of color around the North Pole caused by solar wind and the Earth's magnetic field. (nationalgeographic.org)
During the colder dry season (ca. 18 °C, May — November) the species has rather uniform wing patterns and small eyespots, while it exhibits large eyespots and bright bands on both wings in the warmer wet season (ca. 23 °C, December — April)(Larsen, 1991; Lyytinen et al., 2004). (jeb.biologists.org)
Aspects of Color Field abstraction show up as bright bands indicating rainbows, suns and mountains. (nytimes.com)