One of the most painful situations for which I am sure many have gone is to find someone who greets us very warmly and we began to ask about how we are, and what about the family, etc ... while in our heads we're busy wondering about who the hell is this person!. Fortunately there are clues that ultimately help us remember who that person is. My favorite is key when asked outright ... hey, excuse me .. but .. who you are!. Of course, this is the last resort, because I do not like to go thinking, and who the hell would that be?!.
A bird brain
Well it now appears that, unlike a server, until the Ravens are better than one to remind people. Marzluff, Walls, Cornell, Craig Withey and the Universities of Washington and Willamette, the United States, published in January 2010 in the journal Animal Behaviour, an article entitled "Lasting Recognition of Threatening American people by wild crows" would be something like as lasting recognition by Ravens threatening American people. "
These investigators were to 5 suburbs of the city of Seattle to find areas with plenty of crows. Once these places were located, measured the responses of crows to subjects who were wearing different masks. Subsequently, in each of those sites were caught between 7 and 15 crows and marked, then free them. During this procedure was used only one type of mask for each of the five sites selected. The catch crows pose a threat to these wild crows, as obviously never been trapped or manipulated by any human being.
And then ... What happened?
Well, once this phase of the experiment, the researchers returned to each of these sites and measured a Once again the crows' responses to the different masks. The result they found was that the crows reacted aggressively only to the individual who was wearing the mask that was used in this specific place during his previous catch and release, completely ignoring any other individual who used a different mask. The researchers showed this effect even two and a half years after the experiment, which not only involved in the attack crows who had experienced the original episode, but also were also involved the offspring of these crows, showing an effect of social transmission of learned more than a couple of years earlier.
This article already in itself is interesting from the point of view of studying the neural basis of recognition of faces is even more surprising now that the U.S. managed an emotional catharsis after having eliminated Osama Bin Laden. But .. What has this to do with the crows?, It turns out that being so urged Americans to put an end to his nemesis, then decided to even explore the possibility of training crows to help find bin Laden. The plan was to expose the double crows Bin Laden, and then release them into the regions where this guy might be hiding. And no, not hesitated!, Americans actually explored this idea as shown in the following video:
How about, perhaps we should begin to train our crows to identify criminals from the main list of the most sought after, of course, until we see them fly with a gold chain on the legs, then yes, I know which side the iguana chewing gum!.
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