Can a parrot be a service animal?

Yes, parrots are exotic animals and not truly domesticated with the possible exception of cockatiels and parakeets. Parrots may become good pets but some never adapt to human companionship. They require a lot of work and interaction as they are quite intelligent. In general, parrots are noisy, destructive and messy. They can also be expensive to feed and many require a specialized diet. Some of the larger birds can easily remove a finger should he not want to be touched. I currently have about 17 parrots so speak from experience.