[driverdan]

Unfortunately I don't have sources to cite or know enough about the topic to explain it eloquently but I know you're wrong. Tool use is far more abstract and requires much more intelligence. The animal has to recognize and understand the problem at hand, the fact that they can create a tool, and then the method of using that tool. Nesting is an evolutionary trait that has existed for a long time.

[pfortuny]

Depends on what you call 'intelligence': making a home for living is more intelligent than just picking a stone for playing, is it not?

Building for the future (you know, you do not build a nest with a couple of straws) means projecting oneself in the future: that is intelligence for me.

'I know you're wrong' is quite strong.