The difference between nestlings and fledglings Nestlings Nestlings are baby birds that have little to no feathers. As they are so young, they won't survive long outside the protection of the nest, so where possible nestlings should be re-nested and left in the wild. If you can't see a nest in the surrounding trees, or it's fallen/damaged, then you can make a replacement nest to put the nestling back into. This could be as simple as a basket or plant pot with some nesting material inside, securely attached to the nearest tree. If the bird is injured, the quickest way to help is to contact your local wildlife rescue centre or vet. Fledglings Fledglings have all (or most) of their feathers and leave the nest just before they can fly, so it's normal to see them on the ground. Keep your pets away from them, leave them alone and monitor them, as their parents are usually nearby. Even if you have already confined a healthy fledgling, you may still be able to return them to their parents. If they're in immediate danger, place them in a sheltered spot a short distance away.