This is important, as a wildlife rehabilitator will know how to care for a wild animal like the bird you found. You can usually find lists of local rehabilitators on local and statewide government wildlife websites. You can also call veterinarians for recommendations. In fact, it's illegal for a person without a license to attempt to rehabilitate a wild animal or bird without help from a licensed professional. Birds are protected under the Migratory Bird Treaty Act, making it illegal for you to keep one in your possession without a license. The rehabilitator may tell you how to care for the bird, or they may tell you it's best to bring it to someone who is licensed to care for it. Either way, you'll know how to move forward. Birds have diverse requirements for diet and care, and wild birds do not adapt well to captivity. Animals that are rehabilitated face one of four fates. The best option is the bird will recover and be released back into the wild. If it is not possible to release the bird back into the wild, the bird will be placed at an appropriate facility and used to educate people. The other two options are not as pleasant. The bird may die from the condition, or it may need to be put to sleep if the injury is too severe. If you insist on keeping the bird, you will need to be licensed, as it is illegal to keep wildlife without a permit or license. You can apply for the proper paperwork through your local government.  To obtain a license, you need to fill out the permit form from the U.S. Fish and Wildlife Service for the federal government, as well as a form for your state government. To be permitted to rehabilitate animals, you need to have the knowledge and expertise to care for wild animals. You will need to answer questions about your knowledge, as well as about how you were trained to care for animals.
Find a wildlife rehabilitator. Ask how to care for the bird. Deliver the bird to a licensed wildlife rehabilitation professional. Understand what will happen next. Obtain a license.