http://news.sciencemag.org/sciencenow/2012/07/the-wisdom-of-not-being-too-rati.html?ref=em
Very nice article by Michael Balter which refers to the prodigious learning of which crows, and other corvids, are capable (citing Nickie Clayton's work) and some very important ways in which children's learning behaviour goes beyond, allowing them to solve problems that crows find beyond them.