Common goldeneyes spend most of their time on the water. They eat mainly aquatic insects during breeding season in northern, boreal lakes. In their winter ranges they rely on diving for fish, crustaceans, and mollusks.
If you spot a winter roost, listen for their whistling wings as they take off because the wind whistles through their wings when they fly.
head-throw-kick," in which a male repeatedly thrusts his head forward, then moves it back towards his rump and utters a call. He then flicks his head forward again while kicking the water with his feet.
You can check out eBird to see if there are any winter roosts near you.
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