But why do birds seem to seek out the airborne equivalent of a nasty traffic jam? The basic urge to join a flock seems to be the result of evolutionary pressure from several factors: protection from predators, statistically improving survival of the (shared) gene pool from attacks from predators, profiting from a larger effective search pattern in the quest for food, and advantages for social and mating activities. It is clear why an individual bird wants to avoid collisions with its flockrnates. viors: a desire to stay close to the flock and a desire to avoid collisions within the flock. The animations showing simulated flocks built from this model seem to correspond to the observer's intuitive notion of what constitutes "flock-like motion." However it is dif. Working independently, the birds try both to stick together and avoid collisions with one another and with other objects in their environment. The model is based on simulating the behavior of each bird independently. Conclusion This paper has presented a model of polarized, noncolliding aggregate motion, such as that of flocks, herds, and schools. Behavior models of this type have been created by other investigators, but they have not yet been implemented for the bold model described here. More interesting behavior models would take into account hunger, finding food, fear of predators, a periodic need to sleep, and so on. Real animals have more elaborate, abstract behaviors than a simple desire to avoid a painful collision they have more complex motivations than a simple desire to fly to a certain point in space. Tile boids have a geometric and kinematic state, but they have no significant mental state. behaviors that have been discussed in this paper are all simplistic, isolated behaviors of low complexity.
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