One interesting aside in this article was that the crows don't teach each other how to make tools. But a child might steal a tool from a parent and work it out. This demonstrates the problem solving type of intelligence, working out how to reshape a wire to a useful shape for instance. But not a 'higher' intelligence teaching or demonstrating to others. Which is kind of odd, as I see young birds following their parents and imitating and learning. So I guess this shows parent birds don't teach, but young birds instinctively follow around and learn?