15. Sheep

If threatened, they make large groups and run away together from predators. Can remember and identify animal face (other sheep’s in the same group) can remember and identify human faces.

14. Pigeon

They have a great memory that can recognise themselves in the mirror, can remember hundreds of different photos and learn routes to their home from long distances.

13. Rat

Once they’ve experienced rat trap, they wont get trap anymore!

They have a strong social relationship, If their partner dies they can be so depressed and commit a suicide.

Like dogs, can be trained to sniff out land mines and bombs.

12. Octopus

Octopus are the smartest among all invertebrates because they can change color in less than a second, mimicking seaweed, crab, coral, etc. They can also use tools with their tentacles (e.g. open bottle).

11. Squirrel

They can remember their home by identifying trees, bushes, flowers, etc. Every fall, they bury a thousands of nuts in many places and they can remember where to find all nuts during winter. To fool their rival, they make some “fake nuts burial”.

10. Pig

In fact, they’re one of the cleanest and odorless animals, they have emotions, sensitivity, hurt feelings and can easily get bored. Very sociable to humans, trainable. Some say they are more trainable than dogs.

Some farmers in the U,K constantly provide different activities so the pig will not be bored.

9. Cat

Trainable, can recognize radio, television, they can even check traffic before crossing the street. They’re smart enough to get attention (meow, rub near ankle, follow you, sit on your lap, etc.). Cats can hear and recognise their owner’s footstep or stranger’s footstep.

8. Dog

The man’s best friend, very trainable, sociable to humans, can understand commands and obedience. Can identify and remember animal or human faces they’ve met, they can recognise radio, television, etc.  Dogs can be sensitive, jealous and they won’t forget someone hurting them in their entire life.

7. Parrot

Parrot can mimic human words, understand the meanings, can remember many words and make sentences. Well-trained, can count up to 6 and can identify many objects. They can answer simple questions and can use tools with their beak (e.g.painting).

6. Crow

They’re the smartest among all birds, can count up to 3. Very creative because they can make and use tools without training (e.g. use branch to gather food). Sometimes they put nuts on the street and wait until a car or a pedestrian cracks the nuts, then they'll eat the nuts.

5. Elephant

Elephants can recognise themselves in the mirror, very altruistic. Among other animals, they have they’re own “death ritual”. They use their trunk to take a bath, drink, get food, play, they even use tools (e.g. painting).  They can mimic sounds, few human words and can understand the meaning if they’re well-trained.

4. Monkey

Monkey can imitate humans behaviour without training and if well-trained, they can behave like humans (e.g drink from a bottle and ride  bicycle). Like humans, they have egoism, vain, pride and strong relationship. If two monkeys were fighting, the relatives of one monkey will threaten the relatives of the other monkey.

3. Whale

They can find their relatives separated miles away in the sea, they have their own language to communicate, can call each other and have a strong friendships in a group. Whales can “sing” with their sound and can make many different “songs” in a pleasant tone.

2. Dolphin

Dolphin is the smartest aquatic animals, they can recognise themselves in the mirror. Very trainable and can hold and use different tools with their teeth for painting. They use whistling sound to communicate with best communication system among animals.

1. Great Apes

98% of the great apes genes are the same as ours, the smartest species is chimpanzee. They can recognise themselves in the mirror, they can make tools (e.g. stone to cut food), use tools (e.g. painting). Just like us, they can kiss, snuggle, tickle, laugh, can count very trainable and have their own language.