Animal intelligence It's well known that a lot of animals can identify the individuals of their species by facial features. On top of that, they can differentiate faces by pictures alone. Well it's easy to perceive that it is a basic ability. Because they need to adjust their behavior to encounter different companions. Ethologist want to advance the research further. They test the horse's ability to recognise the human faces by pictures. The experiment is something like this:they trained the horse to use nose to choose pictures side by side on computer screens then they put the photographs of its current owner alongside someone else the horse never encounter before. The tester found that the horses can choose correctly at a rate much better than chance, saying 70%. What's more, the horse can recognize their former owner as accurately as current one. The Ethologist thought the result shows that the hose have a robust long term memory about human faces compared with our longest co-existed domestic companions-dogs. And the horse know that the photographs are 2-D representations of real life without any other help like odor or sound. All in all from these tests we can easily come to the conclusion that the animals have the same cognitive ability just as we humans do at the primary level. Next time be kind and gentle to our intelligent companions.