F/9.0, 1/320, ISO 500.
Did you hear about the duck with a drug problem?
He was a quackhead.
Interesting Fact: Canvasbacks are social outside of the breeding season; they gather in large rafts by the thousands to tens of thousands. Only when winter food is scarce or clumped do they defend foraging areas against other Canvasbacks. During spring and early in the breeding season, they act more aggressively. Threat displays include putting the bill in the water or on the chest, jabbing, pumping the head, or chasing. ( https://www.allaboutbirds.org/guide/Canvasback/lifehistory )