Collective Animal Behaviour

Animal senses are finely tuned to their environments. Rats are known to flee hours before an earthquake and birds to take flight before a tornado. Yet animal movements themselves are rarely glimpsed by humans, save for a flattened patch of grass here or a snapped twig there. What if we could track secret animal movements all over the world? What would they tell us about how our planet is changing? Would humans be more prepared for natural disasters and disease? Could we prevent further species loss and climate catastrophe?