Well-Schooled Fish and Feathered Bandits: The Wondrous Ways Animals Learn from Animals by Peter Christie

From the back of the book:
We know that people learn from other people, but what about animals? Scientists now believe that animals are better students than we realize. In Well-Schooled Fish and Feathered Bandits, peter Christie offers stunning examples of animals that learn from each other, including clean-freak monkeys who wash sand-covered sweet potatoes and well-mannered whales who form "greeting lines" when they meet.