Using your own words, summarise the information in this paragraph in 50 words.
Moving and feeding in large tight-knit groups is an important survival tactic for some prey animals. In a group, there are many more pairs of eyes to watch out for danger. At the same time, predators find it very difficult to single out an individual for attack when the animals are clustered close together. What’s more, if the group suddenly disperses, a predator may be confused by the sheer number of animals fleeing in all directions. That’s one of the reasons why grazing mammals gather in herds on grasslands, and why many marine fish swim in shoals.
Post your refined response as a comment by Monday 27 September 2010.