Crow is a tough, long-lasting species

The ravens have a special memory. It remembers specifically and in detail what happens in relationships with people of the same type (friends or enemies). This conclusion draws from the long-term observations of the behavior of crow flocks living in European cities.

>>>Crows can recognize human voices

Biologists at the University of Vienna have confirmed that after a long time of breaking up with fellow men of the same colony, crows can still recognize the cries and responses in a way that is consistent with their personal or primitive relationship. love or hate. The sound of greetings to friends is different from the hostile or vigilant voice of the unfamiliar.

When responding to the greeting of a crow that had been used to it before, the crow divided into many small sounds but when confronted with the once-disputed enemy, the cries and the raw voice, the bass. The thing is that everyone knows that crow has memory but other things crows can forget, only friendships, the raven remembers very well and it seems that they never forget.

If the cries are uneven, the timbre is not clear and husky when the crow responds to an unknown crow. In the past, it was also found that other animals also used sound to behave with their fellow human beings to show their relationship. The bass, hoarse are always used by animals to overwhelm the opponent because the low-pitched sounds create an image of a healthy animal that threatens the opponent.

Biologists have proved that animals have the ability to change the nature of sound to show a caste relationship, so today they prove sound in the animal world that exhibits both colors. emotions, among those animals, are very obvious in crows.