Yes, parrot can eat watermelon, it is not only juicy and tasty it also contains nutrition values which is beneficial to the parrot. Watermelon is very useful for the parrot not only the fruit even the seeds can be eaten by parrots. Watermelon actually helps to boost the immune system and hydrate the parrot's body. Parrots actually love to eat watermelons. Watermelons also contains minerals and vitamins which is important for the body.