If you can remember the kind of Dead birds in a dream it will make interpretation much easier. However, if you cannot there are also some more general characteristics that all birds are known to represent which will have ample importance when applied to the interpretation of your dreams about birds.
If you have a dream in which you see dead birds, this generally symbolizes the death of your dreams. This does not mean the type of dreams that you have at night or the kinds of dreams that the bird just appeared in. This is the type of dream that refers to your future aspirations. Perhaps you have big thoughts about what you are going to do in your future. Maybe you have a set plan that you are working on which you plan on leading to success in the near future. There are many types of aspirations a person can have and these are just a few examples, but if there are any specific or even non-specific goals that you are shooting towards, it means that you are going to see those goals fail. It is also possible that you have already seen them die and the dream of the birds is just there to remind you of the horrible injustice you suffered. It is never a good thing to see your dreams go down the chute and it can lead to depression, but all you need to remember is that you can overcome this; the best thing about life is there will always be room for new dreams to be accomplished in the future.