Study: Ravens communicate better than most of animal kingdom
Wild ravens in the Austrian alps have been observed using their beaks and body language to direct another raven’s attention to a specific object, marking the first time such complex gesturing has been documented in an animal outside of humans and their primate cousins.

Can crows read?
Crows can recognise and ascribe numerical meaning to symbols, a new study shows, suggesting that the unusually intelligent birds may be able to “read” numbers and simple icons.

Flexibility in Problem Solving and Tool Use of Kea and New Caledonian Crows in a Multi Access Box Paradigm (PLoS ONE)