Young giraffe stallion Jafari is very impressed by the scents that the ladies in the herd spread. However, he has very special habits to find out whether a female is fertile. Giant panda Wu shows abnormal behavior and eventually withdraws into her maternity den. Could this mean that she is indeed going to give birth to a long-awaited cub, or maybe even two? Koala male Arru suddenly shows worrying behavior: he sleeps on the ground. And that is abnormal behavior for a koala. It is feared that Arru may be ill.