Here's a picture of a crow taking off from a tree branch. We don't have many squirrels in Belgrade (though you can find them in less populated areas of the city) but we have plenty of crows that I think do a good job providing a little comedy relief.
Some studies say that crows are as intelligent as primates. I've seen crows here dropping nuts from the top of streetlamps in hopes that the nut will break open on the pavement. Here's a segment from David Attenborough showing this and other behaviors(the best bit is towards the end!):