They do not need any human assistance. Nor do they have the facilities to raise or release young animals. If you see a baby animal, leave it alone. Wild animals have enough offspring to ensure that one or two survive so that reproduction is successful. Those that do not survive feed other wildlife that are trying to raise their young.
Baby birds leave the nest before they can fly.
Many leave the nest partially feathered and still dependent on parents for food and training. Like rabbits, parents will not approach young if you remain in the area watching. Fledging often takes three to seven days. During that time the young are vulnerable to predators. Assist these animals by keeping dogs and cats inside.