A photo from open sources the New Caledonian crows have a level intelligence of a 5-7-year-old child and can even solve simple problems in physics. The incentive to work intellectually for birds is Of course, edible reward. University of Auckland scientists led by Sarah Gelbert investigated whether the crows are capable of deciding volume tasks. In such tasks, the birds had to raise the water level in the flasks, throwing stones at them, and thus displace excess fluid and get food. The study took involved only the New Caledonian crows that are known for their ingenuity and ingenuity. Not all individuals coped with all tasks, but 4 out of 6 problems the birds solved. For raising water levels they demonstrated an understanding that there are objects drowning and floating, solid and hollow. New Caledonian crows also chose a flask in which the water level was higher than others, and so they needed to make less effort to raise her level. 2 tasks with which not savvy ravens dealt, demanded an understanding of the diameter flasks, as well as a not entirely logical decision and understanding of the rule interconnected vessels. “These results are impressive because they discover the magnitude and boundaries of understanding ravens. In particular, all the crows failed the task, which violated the cause and effect rules, but all the others passed, so we can assume that they have a certain level of understanding of causation, “- says researcher Sarah Gelbert. 
Photos from open sources
The tasks that the ravens needed to solve. Illustration: Sarah Jelbert / cc-by
Water Birds
