Blue jays are known for being loud, aggressive, and absolute frauds, pretending to be other birds by copying their calls, all to disguise the true monsters underneath. They are also known to be horrible thieves, stealing far more than would be a fair share from outdoor birdfeeders, costing those unfortunate owners far more than they would have spent otherwise. And, even worse, not only do they also steal and eat the eggs from other birds nests, but they will sometimes even do so with other baby birds, as well.