Well, this depends on the individual bird. There is no one answer that fits everyone. Some birds are better at being left home alone than others. If you plan on leaving your bird alone for several hours at a time, he may get lonely. He could get bored and start misbehaving. When you are gone, have a playmate come over and hang out with your bird. if you leave your bird home alone for a couple of hours a day, then that is fine. Just remember to exercise your bird a lot to keep him entertained when you are gone.