Mergus Merganser
The common merganser (lat. Mergus merganser) is a large seaduck.
It is 58–72 cm (23–28+1⁄2 in) long with a 78–97 cm (30+1⁄2–38 in) wingspan and a weight of 0.9–2.1 kg (2 lb 0 oz–4 lb 10 oz); males average slightly larger than females, but with some overlap.
Critically endangered species in Croatia, nest numbers range between 4-10 pairs per year.