Ability to communicate, problem-solving skills, and several other factors are taken into account while determining the intelligence levels in animals. It's difficult to come to a consensus with regards to a list of the 10 most smartest animals. There is bound to be a difference of opinion on the inclusion and exclusion of certain species from this list.
Chimpanzees are quite organized in various activities they perform. They prepare their own tools with the help of available materials and use them for hunting. Qualities like self-awareness, altruism, and empathy are also exhibited by them.
Being territorial in nature, they even go on to exhibit behavioral traits like possession, invasion, etc. In terms of memory, chimpanzees are superior to humans. Social hierarchy is an important feature of the nature of chimps. In fact, the urge to move up the social hierarchy is also seen in them.
Apart from communicating efficiently, dolphins are known to be efficient hunters who set up traps to catch their prey. They follow instructions given by humans without any difficulty, and are also capable of solving puzzles and working in teams.
Developed emotions and depth of understanding are important behavioral traits of these mammals. It has been observed that elephants mourn if any of their companion dies and even remember the location of the grave-site. Other important qualities possessed by elephants include compassion, empathy, and self-recognition.
Rhesus monkeys are highly social in nature, such that they even go to the extent of planning attacks together. Vocal systems of these monkeys are sophisticated. Experts though, suggest that there are many similarities in vocal systems of rhesus monkeys and humans.
Rats are used in testing and carrying out studies more than any other animal in the world. In a study presented in 2007, the mental ability called metacognition, which was until then only seen in humans and some primates, was observed in rats.
These creatures are also able to count, distinguish between shapes, and use different tools. Understanding social hierarchy also makes them stand out from the rest.
Adaptation to changing environmental conditions is an important trait possessed by them. Apart from being intelligent and organized, ants are physically strong. They are capable of carrying 20 times their own weight.
African gray parrots don't just imitate human speech, but also mimic household noises and other sounds. One particular specimen from Japan, for instance, is capable of identifying 50 different objects and numbers up to 6.
North Pacific Giant Octopus
The North Pacific giant octopus boasts of being the smartest invertebrate in the world. Problem-solving skills and observational learning are not alien for this cephalopod. It is also known for its exceptional memory. Camouflaging and ability to mimic are its other qualities.
They also exhibit emotions like grief and anger; the former being mostly observed in the case of the death of a family member.