The Intelligence of Crows -Another Discovery

[Catherine]

I have never heard the word recursion either.  If only I could think of a way to use it in a sentence.

It figures that crows can do it. If we can do something, it often turns out that crows can do it too.
Crows are way more intelligent than we recognize. I think a lot of animals are. We just don't know how to measure their intelligence.

You are right about nest building. It is very complex. Birds must have many skills to create nests. 
I doubt that most humans could produce a nest. 
I am not sure all humans can do recursion. 
I wonder what other skills crows have that we have not yet recognized.