Mystery #3Tier 2animal groups / safety
Why do so many animals choose to live crowded together in big groups?
Out on the plains, thousands of wildebeest move as one great herd. In the sky, starlings swirl in flocks of many thousands. Under the waves, fish gather in shimmering shoals. Living squashed together sounds noisy and crowded, so why do so many animals choose it?

Your guess
What is your hunch: why do so many animals choose to live jammed together in a big group?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.