Rein in your instinct to feed bird. Yes, it may be hungry and it will likely eat if you give it food. However, if bird is dehydrated, feeding it can often kill it...you will have no way of knowing if a bird is dehydrated, a professional raptor rehabilitator will. Resist the urge to feed, please!
Do not try to hydrate bird! Using a spray bottle to mist bird or dropping water into mouth will not hydrate bird and can cause additional problems.
You may put a bird bath basin directly on ground near bird (filled with water). This may encourage bird to drink on its own.
First, Do Not Panic. Do not take injured bird to a nature center, zoo, veterinarian, or give to a state licensed wildlife rehabilitator, unless directed by a federal licensed wildlife rehabilitator.
Birds of prey are protected by the North American Treaty Act, and only federally licensed rehabilitators are allowed to treat and care for birds of prey. There are reasons for this, for more information on this, go to, Regulations page