As you can see, she became much more male-like with maturity, resulting in several mistaken reports of male birds. She is also the individual wild bird I have gotten to know the best in all my time birdwatching. Until autumn 2019, she would disappear to parts unknown for the summer but, presumably since going through duck menopause (I'm not making that up!), has not bothered to migrate and remained here all year-round, making her the one and only resident Ferruginous Duck in the whole of Belgium. I have thus taken dozens of visitors to see her over the years and knew all of her favourite places so I rarely had a visit to my patch without finding her. She would also allow me to get very close before calmly swimming away. Very much a loner, she was occasionally found in the company of Tufted Ducks, attracting the attentions of bachelor males, and I even saw her being courted by a male Wood Duck once. Goodness know what the resulting hybrids would have looked like had that succeeded!
My year-listing, despite seeing 53 species on on near my Brussels patch yesterday, doesn't quite feel the same without her. I'll miss you, Fergie.