Bufflehead

Fascinating facts about the Bufflehead

• A bufflehead's head is so disproportionately large it looks like a cartoon character — the skull takes up nearly a third of the bird's entire body weight. Males have a glossy purple-green head the size of a golf ball perched on a body barely longer than a robin's. This grotesque ratio exists for one reason: their brain is crammed into that bulbous skull, and they need the space to process underwater hunting in near-total darkness, where they chase insects and amphipods through murky lake beds at depths up to 6 metres.
• When a bufflehead dives, it doesn't use its wings like most ducks — instead it transforms into a submarine, pumping its legs so fast they blur into a propeller. Their legs sit so far back on their body they're nearly useless on land, but underwater they generate enough thrust to chase fish fry with the agility of a hummingbird. Watch one hunt and you'll see it hover, reverse, accelerate and brake in ways that defy how water physics should work at that scale.
• Buffleheads are cavity nesters, but here's the catch: they can't drill their own holes. Instead they evict flickers and other woodpeckers, stealing pre-made nests in aspen and birch trees across boreal Canada. A pair will return to the same nest tree year after year — some sites have been reused for over 20 years straight. The female lays just 6 to 8 eggs, the smallest clutch of any North American duck, because there's only so much room in a woodpecker's old apartment.
• Males perform one of the strangest courtship displays in waterfowl: they sprint backwards across the lake surface at full speed, spraying water and making a sound like a squeaky toy being trampled. This backwards sprint lasts only 2 seconds but happens dozens of times per morning, often diving and popping back up like a feathered jack-in-the-box. Females watch impassively from the sidelines, apparently unimpressed by what looks like a technical malfunction.
• At just 270 to 410 grams, buffleheads are North America's smallest diving duck — a male weighs less than a deck of cards. Yet they're tough enough to spend winters on the Atlantic and Pacific coasts, surviving in saltwater and freshwater alike. Their metabolism is so efficient they can maintain body heat in near-freezing water for hours without shivering visibly, a trick made possible by plumage so densely packed that water never touches their skin.

At a glance

About the Bufflehead

In the shimmering expanse of a winter lake, a tiny, iridescent king darts and weaves, the bufflehead's sleek, black-and-white form slicing through the water with effortless ease. As it forages for aquatic delights, its oversized head bobs and dives with comedic flair, a testament to the remarkable adaptability of this smallest of North American diving ducks. With a soft, whistling call, the bufflehead announces its presence, a fleeting glimpse of beauty in the frozen landscape, its very existence a celebration of resilience and joy.

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