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 2 to the god simulation and city-building elements introduced in the original "Black & White", "Black & White 2" also features elements of real-time strategy gameplay, with the addition of controllable warfare and fighting units. "Black & White 2" also features a more conventional HUD (heads-up display) system than its predecessor. Rather than the experimental HUD-less gameplay seen in the original game, "Black & White 2" features HUD notifications that inform players of their creature's state of mind, the effects of their actions on their creature, the status of villages, etc. The only way the player can interact with this world