Knowing human beings, what we see are quite accurate features, double eyelids or single eyelids, high nose or short nose, moles or moles on the face. But when we think of an animal, what do we think of? Friends can think about it, what is a gorilla like? Is it roughly human-shaped, with black hair all over, and some behaviors are similar to those of humans, and they basically don't think of their facial differences. From the way we identify people and animals, we can see that our identification of people is accurate, while the identification of animals is more about classification. An animal meets certain characteristics, but we rarely deliberately remember every individual animal.
This situation is probably due to human needs. We need to know the people around us in order to communicate with each other, but we don't need to know every gorilla. For us, they are close relatives of human beings, squatting in trees and eating fruits. Generally speaking, we live in a town, and we don't need to treat and identify every animal seriously.
This is probably due to the memory characteristics of the human brain. Memory is the formation, destruction and reconstruction of the connection between neurons, so the information of memory in the brain is more contact and long-term, which is also in line with the memory forgetting law of human memory-forgetting-recognition and recall. To form a solid and fine memory, we need more contact and more memories. We have the most contact with people, so the brain absorbs more information from all kinds of people and strengthens it constantly. So that we can recognize Zhang San, Li Si and Wang Wu, we can see that people are talking nonsense, and we have met many people more than once, so the memory of the corresponding faces is very specific and detailed.
Modern human life style has been relatively divorced from the wild environment. We don't need to identify every individual animal, and there are few opportunities for contact. The few individual animals we see rarely remember those rough and easy-to-remember features. Here is a special example. The parents of twins can recognize the boss well, but it is difficult for outsiders to recognize him. After a long period of observation, the parents of twins can easily recognize the boss according to the differences that are difficult for outsiders to distinguish.
In human eyes, many animals' faces are basically the same, but they rarely remember the uniqueness of their faces. We just need to know what kind of animal this animal belongs to and what harm it may have, and we don't need to know the uniqueness of each tiger. Few people can afford a tiger. Simply put, this is a question of how much contact. Keepers can easily identify the unique characteristics of each giant panda and tiger, because they have more contact with animals than humans in their daily work, and they must also remember the eating habits and personality characteristics of each raised animal. Continuous situational stimulation enables them to obtain the detailed characteristics of their animals and identify each animal well.