Juvenile birds are young birds that have recently fledged from their nests but are not yet fully mature. They often have different plumage compared to adult birds, which can help them blend into their surroundings and avoid predators. During this stage, they are learning essential survival skills, such as foraging for food and flying. These young birds typically rely on their parents for food and protection until they become more independent. The transition from juvenile to adult involves several stages, including molting, where they shed their feathers to develop the adult plumage characteristic of their species, such as sparrows or eagles.