Which of the following defines the role of a falconer?

The role of a falconer is best defined as a person who is licensed to practice falconry. This entails not only having the necessary certification and permits but also possessing a deep understanding of the art and science of training and caring for birds of prey. Falconry involves the use of trained raptors for hunting and requires a dedicated commitment to ethical practices, conservation, and maintaining the health of the birds. A licensed falconer must adhere to regulations that ensure the welfare of the birds, which includes proper housing, nutrition, and training techniques.

The other options, while related to aspects of avian study and care, do not capture the full scope of what it means to be a falconer. Collecting bird species, engaging in birdwatching, or specializing in raptor nutrition describes specific activities or fields of interest, but they do not encompass the overall responsibilities and formal qualifications associated with falconry.