Cool! Though I have no idea why he would call it a "paradox". Nothing paradoxical here in the slightest.

Crows are also very good with numbers with some reports of them being able to count to at least 16. The can understand analogies. And create and use tools to solve problems.

Here's a few crow videos: http://hereandnow.wbur.org/2015/03/12/crows-intelligence-gifts