Vanessa cardui of the sky, implying the use of a solar compass to orient its migratory direction and maintain a straight flight path. "V. cardui" displays a unique system of continuous mating, throughout all seasons, including the winter. This may be attributed to its migratory patterns, thus significantly affecting its mating behavior. During European migrations, the butterflies immediately begin to mate and lay eggs upon arrival in the Mediterranean in the spring, starting in late May. In the United States, painted lady butterflies migrating towards the north experience poor mating conditions, and many butterflies have limited breeding capabilities. The "local adult generation"
Black and white been used to light for color. By shooting in black-and-white, the filmmakers did not have to rent lighting equipment. The movie "Pi" is filmed entirely in black-and-white, with a grainy effect until the end. In black-and-white still photography, many photographers choose to shoot in solely black-and-white since the stark contrasts enhance the subject matter. Some formal photo portraits still use black-and-white. Many visual-art photographers use black-and-white in their work. As a form of censorship when movies and TV series are aired on Philippine television, many gory scenes are shown in black-and-white. Sometimes the exposure of innards or other scenes too