Walnut Exchange Program: Cockatoo “Recycles” for TreatsFebruary 2, 2010
This cockatoo has learned that it can barter for a yummy treat by bringing back an empty walnut shell. Shells = currency in this simple economy. The owner explains “if I don’t want him to ask for more, I simply remove all the empty shells [from the cockatoo’s reach]”
How clever! The bird has learned that it needs to bring something in exchange for a treat and there’s no point to begging.