Vanessa cardui migrations take place at high altitude, which explains why these migrations are seldom witnessed. "V. cardui" is known for its distinct migratory behavior. In California, they are usually seen flying from north to northwest. These migrations appear to be partially initiated by heavy winter rains in the desert where rainfall controls the growth of larval food plants. Painted lady migration patterns are highly erratic and they do not migrate every year. Some evidence suggests that global climatic events, such as el Niño, may affect the migratory behavior of the painted lady butterflies, causing large-scale migrations. Based on experimental data, the
Black & White (video game) programs such as AOL instant messenger and ICQ and convert text to a speech bubble from the creature. It was intended for players to be able to upload the main game's creature into "Black & White: The Gathering" and its experiences to be saved into the main game. Another online program, "Black & White Worlds", was in development. This would have taken place in the worlds of the main game. Molyneux explained that there was to be a server, whose worlds would have been set up with a match-making system and players would have been able to do battle, like