 New Caledonian crows perform similarly, but Western scrub-jays appear to fail.The findings have advanced knowledge of bird intelligence; the Eurasian jay had not been scientifically observed to use tools either in the wild or in captivity before.The research also indicated that physical cognition evolved earlier in the corvid family than previously thought as the not closely related crows and ravens were already known to score highly on intelligence tests, with certain species topping the avian IQ scale and tool use is well-documented.