Adelie Penguin
A medium-sized Antarctic penguin recognized by white eye-rings on a black face — one of the most-southerly breeding birds on Earth, completing 13,000 km annual migrations on sea ice.
29 birds containing the letter U — each with origin, classification, and notes.
Below are birds that contain the letter U anywhere in the name. Each of the 29 birds below opens to a full profile.
A medium-sized Antarctic penguin recognized by white eye-rings on a black face — one of the most-southerly breeding birds on Earth, completing 13,000 km annual migrations on sea ice.
A bold, intelligent corvid with vivid blue, white, and black plumage native to eastern North America, a notorious mimic that imitates hawks to scare other birds.
A small bright-blue thrush native to North America — a beloved garden bird whose population was rescued from near-collapse in the mid-1900s through one of America's most successful citizen-science conservation campaigns.
A family of small, seed-eating songbirds found across Eurasia and the Americas — males are among the most brilliantly coloured birds of temperate regions, with deep blues, reds, and purples unmatched by larger species.
The largest British bunting — a large, streaky, plain-brown bird of arable fields with no distinctive markings but an utterly unmistakable song, often described as jangling keys; the corn bunting has declined severely across Britain as intensive farming reduced the cereal stubble, rough grassland, and insect-rich field margins on which it depends; polygamous males may mate with up to 18 females in a season.
A medium-sized bird famous for its distinctive call (the basis of cuckoo clocks) and brood parasitism — laying eggs in other species' nests to be raised by unwitting foster parents.
Europe's largest wading bird — recognised by its extraordinarily long, downcurved bill and haunting bubbling call; a moorland and coastal bird facing serious population decline across its range due to habitat loss and predation of ground nests.
The most widespread and recognizable duck species on Earth, ancestor of nearly all domestic duck breeds, and a study in iridescent green and chestnut sexual dimorphism.
Britain's most abundant small wader — a dumpy, short-legged sandpiper that winters in enormous flocks on estuaries and mudflats, performing breathtaking aerial "murmurations" that twist and turn as a single organism; in summer breeding plumage it has a distinctive black belly patch unique among similar species.
Australia's largest native bird and second-largest in the world after the ostrich — a flightless 1.8 m tall ratite that runs up to 50 km/h, drinks daily, and once "lost" a war against Australian troops.
A family of plump ground-dwelling birds adapted to cold climates — including iconic species like ruffed grouse, sage grouse, and ptarmigan, with elaborate dramatic mating displays in many species.
A sea-going auk that nests by the million on vertical sea cliffs, packing shoulder-to-shoulder in dense colonies — it flies underwater using its wings to pursue fish to depths of 180 metres, and its pear-shaped egg rolls in a circle rather than off the cliff edge if knocked.
A familiar summer visitor that builds its distinctive mud nest under the eaves of houses — arriving from southern Africa each April, house martins construct domed cup nests from hundreds of individual pellets of mud gathered from puddle edges; the white rump is the key identification feature separating it from the swallow.
The most common hummingbird in eastern North America, weighing less than a U.S. nickel, capable of hovering, flying backward, and migrating across the Gulf of Mexico nonstop.
A small, ground-foraging sparrow nicknamed the "snowbird," common in winter across North America with regional color forms so different they were once classified as separate species.
A small, compact woodland bird that walks headfirst down tree trunks — the only bird capable of descending a vertical surface face-down, and a remarkably efficient hoarder of seeds and insects.
The largest living penguin species and the only animal to breed during the Antarctic winter, enduring the planet's harshest conditions.
A small black-and-white seabird with a colorful triangular bill — capable of holding 10+ fish in its beak at once, nesting in cliff burrows by the millions, and increasingly threatened by warming oceans.
A plump, ground-foraging gamebird with a distinctive teardrop-shaped plume on its head, the official state bird of California and a familiar sight in western U.S. backyards.
The mountain blackbird of Britain's uplands — a stocky thrush resembling a blackbird with a distinctive white crescent bib, breeding on moorland and mountain slopes above 250 metres; a migratory species that arrives from Africa in late March and departs by October, its far-carrying, melancholy song one of the definitive sounds of the wild uplands.
A long-legged ground cuckoo of southwestern North America that runs fast rather than flies — eats lizards, snakes (including rattlesnakes), and forms the basis for the Looney Tunes character chasing Wile E. Coyote.
A common term for various gull species — adaptable scavenger-omnivores found at coastlines, parking lots, garbage dumps, and inland lakes worldwide, with the herring gull and ring-billed gull being among the most familiar.
Africa and Asia's answer to the hummingbird — small, fast, and brilliantly iridescent nectar feeders that perch rather than hover, with long curved bills designed for specific flower shapes.
A diverse family of medium-sized songbirds known for melodious songs and ground-foraging — with the American robin, European blackbird, and song thrush as the most familiar members of a globally distributed family.
The largest toucan species, a Central and South American fruit-eater with a striking oversized orange bill that serves as a thermal radiator as well as a feeding tool.
A large North American gamebird domesticated by Indigenous Americans, surviving through the European-introduced Christmas-and-Thanksgiving traditions, with wild populations recovering to abundance after near-extinction.
A large black tropical bird of South American rainforests, distinguished by an umbrella-like crest of feathers above its head and a long, retractable, throat-feathered wattle that males inflate during courtship displays.
A widespread New World scavenger with a featherless red head and an extraordinary sense of smell — the only vulture that locates food primarily by odor.
A small, range-restricted hummingbird of southern Baja California with a brilliant green back and rufous belly — endemic to the peninsula and one of the few "X" birds in field guides.
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