Kererū, green-blue pigeons native to New Zealand, like to sun themselves after dining on fruit. But in warm summer months, the bird’s sunbathing has a surprising side-effect. A part of their digestive system called the crop stores their latest snack – where it begins to ferment, eventually making the pigeons drunk! The rotund creatures often get so tipsy that they fall out of trees, prompting compassionate people to deliver them to local bird rescues and let them sober up.

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The Golden Eagle is a bird of epic proportions not only for their impressive size but also for the many legends they’ve inspired across human history. They are one of the largest eagles in the world with a wingspan of more than seven feet. When the Aztecs saw a Golden Eagle devouring a serpent atop a cactus, they knew they had found their promised land. Today, that powerful raptor graces Mexico’s national shield. In fact, the Golden Eagle appears on the flags and emblems of several countries including Kazakhstan, where nomadic hunters have practiced an ancient form of falconry with Golden Eagles for thousands of years.

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Polar Bears symbolize the icy landscapes of the far north like no other animal. The bear's way of life — its very survival — is inseparable from the Arctic pack-ice. Less familiar is a remarkable bird that shares with the Polar Bear this vital link to ice: this Ivory Gull. The gulls feed on small fish and other marine life, but also scavenge carcasses, including those left by Polar Bears. Global warming has brought increasing change to the world of ice-dependent species such as the Ivory Gull and Polar Bear.

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From his start in 1937, the gangly, black-feathered Daffy Duck was a cartoon original: wildly outspoken, volatile, and confrontational — a truly daft duck. Daffy was one of the most memorable characters from the golden age of cartoons, paving the way for other screwball cartoon personalities to come.

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A century of logging and fire control has taken its toll on the mature pine forests of the West, the preferred nest site for this Lewis's Woodpecker. But there is hope. Lewis's Woodpeckers also nest along rivers in large cottonwoods, trees of little value for timber. Also, many remaining tracts of old-growth ponderosas are protected on public lands, and the trees are growing larger day by day.

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A bird known as Titanis walleri made its home in Florida just a few million years ago. Titanis, as its name suggests, was titanic indeed — a flightless predator, 5 feet tall, with a massive hooked bill. Titanis and other birds related to it belong to a group some paleontologists call the "terror birds." They were dominant land predators in South America for tens of millions of years. Paleontologists still aren’t clear about why Titanis and its kin went extinct. But whatever factors ended the era of the terror birds also made it a lot less risky to go out and fill your bird feeder.

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Every bird species uses its wings a little differently, and some are specialized for highly efficient flight. But that means going without other abilities. Swallows and hummingbirds, like a Talamanca Hummingbird, capture their food on the wing, but they can’t walk. Swifts, which are acrobatic in the air, can’t even perch. Yet they dazzle with the maneuverability made possible by their aerodynamic bodies.

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To hear a Common Loon in the wild during summer, you’ll need to find a northern, freshwater lake where a pair is nesting. But to find that same Common Loon in winter, you’ll likely need to look on a saltwater bay. This shift from fresh to salt water would kill most animals. But loons — along with many ducks and other water birds — have evolved to make that move. It’s possible that breeding adults nest on fresh water in order to save their energy for raising chicks.

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The Wall of Birds at the Cornell Lab of Ornithology is a towering mural showing nearly 250 life-sized birds across a map of the world. To complete the impressive artwork, artist and scientific illustrator Jane Kim spent 17 months painting day in and day out. Though the experience was often solitary, Jane stayed connected to the outside world through the sounds of wildlife in the nature preserve that surround Cornell Lab.

Read more about Jane Kim and the Wall of Birds in Field Notes!

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Writer and ornithologist J. Drew Lanham shares a note he has written to a Dark-eyed Junco, which he fondly nicknames “snowbird.”

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