http://www.cbc.ca/documentaries/natureofthings/2009/murderofcrows/
Brief of documentary:
* Crows are found on every continent except Antarctica.
* Crows have an exceptional ability to remember and pick a single human face out of a crowd.
* Crows are far more likely to be found living close to cities and suburbs than out in the country.
* Each generation of crows is capable of building on an earlier generation's knowledge.
* New Caledonian crows are one of only three species, besides human, in the world capable of making tools.
* Crows live with a mated pair, their kids, and offspring from previous years in an extended family.
* Crows have different warning calls - one for cats, and one for hawks, and another for humans - 250 in all.
* Crows are omnivores and eat fruits, vegetables and meat.
Skill of crow: how it eats walnut- crow drops the walnut from the specified height. it falls on the road when signal is red. Here words does not describe the skill. watch the video.
