
Photo: (c) Lawrence Hylton, some rights reserved (CC BY) · CC BY 4.0
Mergus squamatus
Diet
Aquatic arthropods, frogs, fish, stonefly larvae, caddisfly larvae, beetles and crustaceans
The scaly-sided merganser spends much of the day foraging, pausing around midday to rest, preen and socialize on riverbanks. Its diet includes aquatic arthropods, frogs and small to medium-sized fish. Stonefly and giant caddisfly larvae can dominate when plentiful, while beetles and crustaceans are taken less regularly and fish become more important as summer progresses. (Wikipedia, general species account)