Canvasback

Fascinating facts about the Canvasback

• A canvasback's head is shaped like a ski slope — the forehead slopes seamlessly into the bill with no stop, making it instantly recognisable in a flock of a thousand ducks. This slope isn't decorative; it houses a longer, narrower skull than other diving ducks, adapted to probe deeper into lake beds for the seeds of wild celery, their favourite food. No other North American duck has quite this profile.
• Males dive 8 metres down to forage on plants most other ducks can't reach, and they do it on a single breath that can last 20 seconds. Their legs are set so far back on their bodies that walking on land looks comical — they shuffle upright like penguins. This extreme positioning makes them world-class divers but nearly helpless on shore.
• In the 1940s, canvasbacks nearly vanished from North America. Drought in the Prairie Pothole region — their crucial breeding grounds spanning parts of Canada and the northern US — dried up the shallow marshes where they nest, and populations plummeted to just 330,000 birds. Today, thanks to wetland restoration and hunting regulations, roughly 650,000 breed each year, a recovery that shows how specific habitat protection can bring a species back from the brink.
• A canvasback's courtship is a symphony of head-throws, chest puffs, and a two-part call that sounds like a cooing and growling combined — males perform it in clusters on open water, competing for females' attention with synchronized choreography. Pairs form in winter on migration, before they even reach breeding grounds, a strategy that lets them claim prime nesting sites early.
• In autumn, canvasbacks stage a refuelling stop in the Finger Lakes of New York, where they gather by the thousands to gorge on aquatic plants before the final leg of migration south. A single bird can add 15% of its body weight in just a few weeks, building energy reserves for the journey and the breeding season ahead — a feat of metabolic urgency that tracks the shortening days like a biological countdown.

At a glance

About the Canvasback

As the canvasback glides effortlessly across the water, its sleek, chestnut-brown body leaves a trail of ripples in its wake, a testament to the elegance and refinement of this North American duck. With its distinctive red head and angular profile, the canvasback moves through the world with a quiet confidence, its webbed feet propelling it with powerful strokes as it searches for the aquatic plants and mollusks that sustain it. In the fading light of day, the canvasback's soft, whispery calls echo across the marshes and wetlands, a haunting serenade that underscores the enduring beauty of this remarkable creature.

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