One thing you may not know about is that budgerigars have the ability to see our world in colour, just like humans. They have no trouble registering different colour nuances, so put those old black and white movies away! :)
Other than that, budgerigars can hear you well and feel you even better. Some even say that budgerigars are able to sense the coming of future events. One thing is for sure: they have truly amazing senses.