Crow bequeathed 'Vengeance' On The offspring

A study carried out for 5 years against the crows that lived in the Seattle, Washington, United States show that crows can remember where the 'dangerous man' for his safety.


Remarkably, this bird can tell this information to their children and other crows.



According to John Marzluff, a professor from the University of Washington, this ability has helped the species to adapt successfully and breed with humans.


"The behavior of each individual human being to the animals is very different and changing," Marzluff said, as quoted from the ABC. "Since humans often present a threat to the animals, the ability to learn social behavior is very useful for animals," he said.


In experiments, researchers used a mask and then trapping, binding and release 7 to 15 birds in five different areas in Seattle.
To determine the impact of the arrest, 5 years later, an examination of the bird's behavior towards the people passing in the location of the arrest.


Researchers used a mask 'criminals' or masks that they wear when trapping the birds. After that they compare it with another mask that has nothing to do with the arrest of the crow.


Within two weeks after the arrests, an average of 26 percent of crows 'scold' criminals who use the mask.



They interfere with that person with flapping wings and wagged his tail.Sometimes, actions that had hurt raven is aided by other crows join in and swarmed 'criminals' is.
After more than a year, more than 30 percent of people wearing masks attacked the criminals. The numbers actually increased more than doubled, reaching 66 percent after three years from the time of trapping of crows.


Marzluff said, the area where the crows to attack humans who use the mask of 'criminals' is also expanding. However, there is no change in the behavior of crows to humans who use the mask of 'good'.