Ruddy duck during breeding season - bright blue bill

Ruddy get bright blue bill during breeding season.
His tail is up, he is "bubling" - part of mating ritual where he is beating his bill against their neck to create bubbles in the water.
The male’s white cheek patches are also very distinctive
00:23 Bubbling - part of the mating ritual
01:04 Female Ruddy duck
01:55 Not breeding Ruddy duck male - black beak
02:08 Ruddy duck is much smaller than Mallard duck
03:02 Male Ruddy duck's tails are different
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