Bohemian Waxwing

Fascinating facts about the Bohemian Waxwing

• In years when rowan berries fail across Scandinavia, thousands of Bohemian waxwings vanish southward in what's called an 'irruption'—some winters they flood into Britain and Central Europe like a berry-seeking plague, the next year they vanish entirely. Scientists still can't predict which winter will trigger the exodus, only that the birds remember which trees bore fruit the previous year and gamble on finding them again.
• A waxwing's gut can ferment berries into alcohol—in winter, when they gorge on overripe rowans and hawthorns, some birds become genuinely intoxicated, flying erratically and crashing into windows. The birds have evolved a liver that processes the ethanol faster than almost any other animal, but occasionally their risk-taking backfires.
• The silky feather tips that give them their name are real, not folklore: the flight feathers end in a waxy, lacquer-like coating of carotenoid pigment that looks like it's been dipped in melted sealing wax. The brighter and redder the wax-tips, the more carotenoid-rich berries that bird ate during growth—a living resume of past abundance.
• Waxwings have no true call; instead, they communicate almost entirely through a high-pitched, ethereal 'ssseeee' that sounds like distant sleigh bells and carries 200 metres across winter valleys. A arriving flock announces itself this way before settling on a tree, creating an eerie, tinkling chorus that Scandinavian folklore once linked to winter omens.
• Female waxwings choose mates based on how quickly a male can offer her food in mid-air during courtship—he'll pluck a berry mid-flight and pass it beak-to-beak while she evaluates his agility and feeding prowess. Only if he impresses her with speed and generosity does she accept him. Their entire pair-bond is built on this single aerial exchange.

At a glance

About the Bohemian Waxwing

As the Bohemian Waxwing flits through the frost-encrusted landscape, its sleek, grey-brown plumage glistens like polished stone, while the vibrant splashes of crimson and yellow on its wings seem to ignite with an inner fire, as if the very essence of the winter sun had been distilled into its being. With a fluid, almost effortless motion, it darts between the skeletal branches of bare trees, its crest bobbing gently as it searches for the succulent berries that sustain it through the harsh, snow-bound months. In its nomadic wanderings, this bird weaves a subtle, yet resilient, thread of life through the frozen wilderness, a testament to the enduring power of beauty and adaptability in the natural world.

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