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The most intelligent bird group according to Lefebvre's research is crows. The Japanese carrion crow exhibits a remarkable behaviour that demonstrates why this bird is at the top of the "bird brain" charts. At a university campus in Japan, carrion crows have developed a unique feeding innovation that exploits human technology. They perch at traffic intersections and patiently wait for the red light. When the vehicles come to a stop, the crows spring into action - they fly down to the cars and place walnuts under the tires. These crows are smart enough to have figured out that the simplest way to open a nut is to get someone else to do it for you.
Originally posted by GoldEagle
The african grey parrot is the smartest bird and close to being the smartest animal. The have been tought to identify different materials, count, understand the concept of zero, indentify colours, do basic math, identify and recall the names of objects and do obsticle courses.