Crows Are Too Damned Smart

From a story about the U.S. military considering using crows to locate Bin Laden (h/t the Dish):

The idea of using crows to find the world's most wanted man was based on the work of John Marzluff, a wildlife biologist at the University of Washington who has been studying crow behaviour for over 20 years. Working with a population of wild American crows on the university campus in Seattle, Marzluff and his colleagues noticed that birds which they had previously captured seemed to be wary of them and were harder to catch.

The researchers therefore decided to investigate the possibility that crows can recognize human faces, and devised a relatively experiment using rubber masks. They went out on campus and in the surrounding areas wearing either a 'caveman' mask or a Dick Cheney mask. Those who wore the caveman mask caught and banded between 7 and 15 crows on each excursion, but those who wore the Dick Cheney mask did not. 

In the following months, they went out wearing the same masks, walking around  the university campus in pre-determined routes without bothering the crows. They also recruited volunteers to do the same. The crows consistently harassed anyone they saw wearing the caveman mask, scolding them with loud squawks and even mobbing them.

This happened regardless of the size, sex or walking style of the person wearing the mask., and even when the mask was partly hidden under a hat or worn upside down. They were, however, indifferent to the neutral mask - when they saw both masks simultaneously, they would ignore the person wearing wearing it, and instead follow the person wearing the caveman mask and scold them aggressively.

They always disappear when I grab a shotgun, and they sure seem to communicate well with each other.