One colobus monkey makes a mistake and it's all over. Adult education is not restricted to humans. In Florida, a green heron has taken learning to the extreme, completely reinventing its hunting technique. Rather than waiting patiently to catch a fish like any other heron, it has discovered the answer to an easy life - bread. As children visit the heron's pond to feed the ducks, the heron steals a small piece of bread, sneaks away and drops it in the water.
Fish soon come to the surface to eat the bread and the heron catches a fish.
It has learnt the art of angling. To really benefit from learning it pays to pass knowledge on. In Argentina, killer whales strand themselves on the beach to capture sea-lions. But they are not born knowing how to do this, and it takes over 40 years to perfect their skills. The same calf is then seen making her first kill.