In general a bird seen in dream has a positive interpretation. Depending on the context in which it is seen in the dream it can points to periods in good imagination, inspiration and clear mindedness in the dreamer.
Simply seeing a bird in your dream standing on something and not flying indicates that you will be able to recognize a positive opportunity in your personal life. This dream can also signify that you will have an information advantage over someone.
Seeing a bird making vocalizations in the dream can indicate that you will soon receive a very surprising but pleasant piece of information. This information will be likely connected with your personal life and possibly a romantic interest that you have.
If you see a bird flying high in the sky it means that in real life you will have a very good amount of energy, inspiration and imagination in the next few months. This dream can also mean that you will finally try to do something new in your life and it might indicate that you are about to make a radical change in your life.
If you see a flock of birds flying it is a sign of you being confident in your ability to take on challenges in your professional life and career.
If a bird lands on you in dream it means that you will picked for something quite special in your professional life. This will very likely be against your expectations and it will be quite surprising for you.
Seeing a large bird of prey flying above you indicates that you need to be careful of your moves in the personal life as indeed people are watching your moves and they expect you to make a mistake.
To be attacked by a large bird in the dream signifies that your enemies will make a move against you.