Ravens and crows are considered to be the most intelligent birds in the world, according to an animal documentary in HD. These birds have been studied extensively and have shown remarkable problem-solving abilities, social intelligence, and tool-use skills. They are able to adapt to various environments and situations, making them highly versatile and adaptive creatures. This intelligence is believed to be a result of their complex social structures and interactions within their communities. Researchers have found that ravens and crows are capable of using tools to obtain food, working together to achieve a common goal, and even displaying empathy towards members of their group.

Overall, the documentary highlights the exceptional cognitive abilities of these birds and showcases their unique intelligence in the animal kingdom.