There is a beautiful documentary about crows on youtube, which shows them being incredibly smart, capable of solving many layered puzzles. I recommend watching it, if you find them just incredibly beautiful and mysterious like I do =)
Here is the link
The Secret Life of Crows
A really common species of crow here is Corvus frugilegus, which I was able to capture with my dslr this summer. it was so beautiful circling around me, probably telling me to move somewhere else hehe.