More on bird intelligence

The article talks about different birds intelligence and, mostly, about how we have grossly underestimated it for hundreds of years. And there is a mistake in it because Dr. P did not start with Alex in the 50’s but the late 70’s [Alex was born in 1976].https://news.nationalgeographic.com/201 … ce-smarts/

https://news.nationalgeographic.com/2018/03/year-of-the-bird-brains-intelligence-smarts/