I have certainly seen such behaviours from corvids. The people who were troubled by crows dropping things on their cars and houses should be grateful that there are no keas where they live! Many of the big parrots are at least as smart as corvids, and keas in particular form gangs to work cooperatively on projects. Those projects have included such things as dismantling rubbish bins, cars, motorcycles and exterior lighting systems.
Their beaks are like a pair of sharp-ended pliers. When I was prospecting in New Zealand many years ago I had way too much experience with keas helping themselves to my stuff, including both food supplies and small tools. While they could, and sometimes would, open the buckles of my backpack if they could be bothered, sometimes they would simply gnaw through the heavy canvas to get at things inside it. The experience I found most alarming was when a kea chewed its way through the solid metal handle of my geopick! Wavewright could probably tell you more about keas.
Corvids, parrots and raptors such as eagles will all drop things from a height to kill them or to break or crack hard shells. There was recently a case in Victoria where a dingo pup was found fallen into a backyard, having been dropped by probably an eagle. The animal survived. And accounts of creatures such as tortoises and shellfish being dropped to open them by birds are very common.
