Several for the species can distinguish between two and five bananas, but what's the exceptional the primates they can't grasp the new American rules, what let they range the piles foods from the least to the most. Now new researchers suggest the pigeons like primates can't follow the upstructure rules. The study is in Journal Science.

 

Researchers trains pigeons with cards, on which pictures are one, two or three shapes, sometimes different sizes and colors. The birds automatically were able to correctly pick card with one large screen first, follow by card with two small red wa*,follow by one showing three long * rads*. Then pigeons demonstrates a new ability, based two cards, each showing up two night images, they could tell which card had more, which indicates they had obstructed understanding the single digital month. R* monkeys trained the similar way to display the same talents. What they shared the ability above independently working from common ancestors is unclear. But it's clear the birds brains are so down.