Several fascinating tidbits in the latest issue of New Scientist:

Learning fast. Within one animal generation, prey animals learn to be wary again of predators such as bear and wolves after the predators have been reintroduced into a habitat. This should have policy implications in the debates about reintroduction. It is still not clear how the prey animnals learn about the predators. For example, this fascinating fact. while wolves are silent and stealthy while hunting moose, mother moose who have lost calves to wolf predation become hypervigilant to wolf howls they have never heard in conjunction with a hunt. New Scientist