
Crows have the brain power to solve higher-order, relational-matching tasks, and they can do so spontaneously, according to new research. That means crows join humans, apes and monkeys in exhibiting advanced relational thinking, according to the research.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/0Xnwtl_GM9A/141218131427.htm