{"fact":"More than just clever, crows are master tool-makers. New Caledonian crows craft 3D tools, a skill shared only with humans, chimpanzees, and orangutans.","context":"tool-making New Caledonian crows are the only species, beside humans, chimpanzees and orang-utans, to craft their tools into a particular three-dimensional form using a sequence of behaviors","source":"Nicola Clayton; Nathan Emery, Corvid cognition, 10.1002/wcs.1286","index":269}