SOCIAL behaviour in some SPECIES of birds increases the odds of survival in an unsafe world.In the passage, the author has argued that flamingos in large flocks are extremely loyal and social.When the parents of chicks have to go to search for food, they gather them into creches which protects them against dangers.This leads to the implication that when birds are TOGETHER, their safety is increased and so are the CHANCES of their survival. Hence, the most logical corollary to the above passage is that social behaviour in some species of birds increases the odds of survival in an unsafe world.