People used to consider themselves the most intelligent creature of the Earth. Despite his weak physical capacity he directs the lion's share of the land and makes attempts to "enslave" the World's oceans. As for animals, their importance was diminished supposedly because of a lack of intelligence.
But don't underestimate the mental abilities of animals, because some of them are not as stupid as it seems at first glance.
Let animals do not have sufficient intelligence to call them "reasonable", but some of them are definitely more intelligent and smarter than others. For example, pigs. They are easily trained, have excellent memory and demonstrate high results in tests for quickness.
Certain level of intelligence seen in parrots, particularly the boy. Yes, in most cases, they simply repeat heard sounds without understanding their meanings, but this is due to lack of proper training. It is proved that they are able to associate words with objects that they denote, but also to grasp the concept of shapes, colors, numbers.
Squirrels are not only smart, but also cunning. They long since learned that the man is the source of food. Once you have fed the squirrel, it is likely that the next day she will be waiting for you at the same place, "know" and take it again. And will take as much as you give — leftover food she hides, remembering "the hiding place".
"Man's best friend" — the dog being very smart. With proper training she is able to understand 250 words and gestures, count to five, to perform simple math. It is worth mentioning that the smartest breed of dogs — poodles.
Of course, this rating could not do without seals. Cats are very smart — they are the main sign of intelligence is the ability to adapt. Moreover, if your cat does not execute the command that you taught her, it does not mean that she forgot. Rather, she just doesn't want to do this: the ability to say "no" — is also a sign of intelligence and willpower.
About the mind of ravens legends, these birds are able to do incredible things to get to the food, for example, to crack a nut by placing it under the wheels of a vehicle, etc., When the scientists decided to check whether the Raven has the intelligence, the bird began to drink water from a deep jug, which he could not get the beak. Subject crows smart enough to throw in a container of different objects to the water level rose. In General, these birds definitely will find a way out of any situation!
That's who you hardly expected to see in this ranking, so it's octopuses! These marine invertebrates have very impressive brains relative to body mass. They are trainable, have a good memory, distinguish between geometric shapes, recognize people, get used to those who feed them. Some mystics believe that the octopus able to predict the future: what is the epic of Paul, "football Oracle".
Open the three "smartest" animals elephants. They recognize themselves in the mirror, that is a sign of self-awareness, have excellent long-term memory and orientation on the terrain, know how to use tools (e.g., branches as a "fly swatter"), there are a lot of sounds, and most importantly — very sensitive to the death of their fellows. These giants are able to draw conclusions and empathize!
Chimpanzees, especially the Bonobo is very smart creatures and are the closest relatives in the animal world. Although chimps can't speak because of the structure of the vocal apparatus, they are able to communicate by hand sign language, to use words in a figurative sense, to create new concepts by combining known words. They are able to make tools (clear sticks from the leaves, to sharpen sticks and stones) and have a sense of humor. If you put a number of baby chimpanzee and a baby, up to 2 years in the intellectual plan you will detect no difference between the (sometimes a chimp is even smarter).
Perhaps the most powerful intellect among animals endowed with the dolphins. And no wonder! The brain of a Dolphin weighs about 1,700 grams, and a man — 1400 g, while the Dolphin twice gyri in the cerebral cortex than a human. According to the latest scientific data, cognitive ethology and animal psychology dolphins not only have a "vocabulary" (to 14,000 audio signals), which allows them to communicate with each other, but also have self-awareness, "social consciousness" and emotional empathy. Moreover, each Dolphin has its own name, to which he responds when he is accosted by relatives! Obviously, people are not the only "intelligent" creatures, except that much more aggressive.