This shelduck (scientific name Tadorna ferruginea) is one of the temporary guests of the Villa Borghese pond. In some periods it makes its appearance, the picture shown here was taken in October.
The shelduck is not generally sedentary in Italy, its range is in Afica and Asia.
The shelduck is very elegant, I really like its particular shape of the beak, I noticed that she does not allow herself to be intimidated by humans, it comes and eats food from tourists.