Crows can recognize geometric regularity

Animal's intelligence is often underrated. We used to keep goats which many wont consider problem sovlers. They had learned to open gate bolts with their mouths. The bolts I am talking about have a handle and a rod. the handle needs to be rotated then the bolt can be slided out while keeping the handle in the rotated state.

My cat learned to jump and grab the door handles to open doors. It was escaping the house that way. I had to lock the door while I am at home so he doesn't escape. After some tries and seeing that it is no longer working, he forgot/gave up at doing it.