Masting has evolved as a defense against
animals that feed on seeds. These seed predators are likely to eat most of the
seeds produced by several different plant species each year. Therefore, if
there is mast seeding, there is a greater possibility that the feeders will
become satisfied before all the seeds (of the species or any given plant) have
Animals can make groups is a
better chance of avoiding predators. Assuming a predator usually will attack
the nearby individual, a bird can decrease its "domain of danger,"
the area in which it can be the nearby prey to a predator, by joining a flock.
Where there is cover, certainly, hiding rather than flocking may be a more effectual
predator defense strategy.
Both these defense
strategies have similarity in making clusters e.g. in case of masting seeds
will make mast seed and in flocking animals will make flocks to defend