Female Peregrine hatched in Wisconsin turns up in Switzerland

Pigment-rich berries from abundant introduced shrubs turn orioles red, cardinals redder

Researchers argue that Painted Vulture, once called a ‘mythical species,’ may have been real

Why Belted Kingfishers sometimes act like flying battering rams.

How American Redstarts painted by an Ontario artist for the 2013 International Migratory Bird Day poster show four seasons of migration.

Three birds of the Eastern Hemisphere -- a Spotted Redshank, Fieldfare, and Gray Heron -- turn up across North America, plus three other photos of vagrants

For cardinals, who’s at the feeder is more important than what’s in it

Feathers plucked from Sharp-shinned Hawks’ beaks and talons reveal an unexpected taste for larger-than-expected birds

Online resource for teens offers access to clubs, careers, and more

Forest-nesting seabird’s population down almost 30 percent in northwest states

Helicopter surveys deliver first-ever evidence of breeding in region of tall cliffs

Survey: 39 percent report bird-window collisions at home

Canada's first Red-flanked Bluetail, Nevada's first Common Crane, and four other amazing rare birds

How climate trends in the Caribbean and Canada are determining the breeding success of Kirtland’s Warblers and Hudsonian Godwits

The first family tree linking all the world's living birds, and what it reveals about the families in which species are evolving quickly.

A rundown of the parks and refuges that were damaged by Hurricane Sandy, and how long you can expect your favorite East Coast birding sites to remain closed.

Photos of Canada's first Citrine Wagtail, New York's first Virginia's Warbler, and four more stunning rare birds.

At the bottom of the world, Emperor Penguins find safety in numbers and tiny bubbles

Why it’s often difficult to tell how far you are from a drumming Ruffed Grouse

Oil, dispersant confirmed in largest colonies of American White Pelican

Feeder offerings aren’t to blame for abnormalities in Alaska’s chickadees

Drought and a poor hemlock crop have been tied to this summer’s unusual irruptions

How a book by Fred Bodsworth, who died in September 2012, revealed to the world the beauty, audacity, and fragility of birds.

Lawns offer lower habitat quality than yards with native vegetation

Birdwatchers are traveling less, spending more than in 2006

Canada's first Kelp Gull and second Thick-billed Kingbird, Iowa's third Roseate Spoonbill, and more rarities from fall.

South American conures are closest relatives of North America's extinct parrot

Observations by amateur naturalists help paint a detailed picture of opportunistic spiders

How a birder in Wisconsin in May 2011 spotted a rarely seen hybrid between Yellow-throated Warbler and Northern Parula.

More than half of survey takers have visited a Hotspot Near You

The first Little Stint in Rhode Island, Red-necked Stint in Kansas, Inca Dove in Georgia, and other fantastic summer sightings.

The first Tropical Mockingbird in the United States, Arkansas's first Gray-crowned Rosy-Finch, the Pribilof Islands' first White-tailed Eagle, Kentucky's first Ferruginous Hawk, and Idaho's first White-eyed Vireo.

World Series of Birding win, single-day record tied

Savannah Sparrow, others may soon be split

Researchers see Kirtland’s Warblers up north after banding them in the Bahamas

Research shows shorebird stewards increase effectiveness of protected areas

The peaceful song of the Common Loon is a reliable sign of its willingness to fight

New Jersey's first Broad-tailed Hummingbird, Maryland's first Virginia's Warbler, Maryland's first Pink-footed Goose, the sixth-ever Snowy Owl in Texas, and more rare-bird sightings.

What surveys completed by birdwatchers from May 2010 to November 2011 at six popular birding destinations in Ohio reveal about the economic impact of birding in the state.

How researchers using light-level geolocators have obtained the first evidence that Black Swifts that breed in western North America spend the winter in Brazil in South America.

How the practice of selective logging in coastal old-growth forests in the Pacific Northwest often removes the trees that Marbled Murrelets are most likely to choose as nest locations.

Why biologists believe that the number of endangered Whooping Cranes that breed in Canada and winter in Texas may not reach 1,000 birds, an important goal for the recovery of the species, for another half century.

Why five teams of researchers in the last three years have reached the same disappointing conclusion — that the Ivory-billed Woodpecker is in fact extinct.

How careful observation revealed a plausible explanation for the age-old question of why the Black Phoebe pumps its tail.

How investigators used mitochondrial DNA to pinpoint the origin of vagrant Cave Swallows that show up on the Atlantic coast and around the Great Lakes.

What researchers discovered about the spring arrival dates of birds in New York, the effects of reduced snowpack on ground-nesting birds in the mountains of Arizona, and how higher wind speeds help Wandering Albatrosses in the Southern Ocean.

Why new artificial nests made of foot-long sections of PVC pipe welcome Eastern Bluebirds, House Wrens, and Tree Swallows but repel European Starlings.

How record numbers of Snowy Owls spotted across southern Canada and the northern United States in the winter of 2011-12 changed prevailing opinions about the species.

Why Bay-breasted Warbler and other migrating landbirds congregate along the shoreline of Lake Huron even before green leaves unfurl each spring.

Kentucky's first Parasitic Jaeger, Michigan's first Lucy's Warbler, Wisconsin's first Inca Dove, Nevada's first Sedge Wren, and more rare-bird sightings.

Scientists and birdwatchers describe the effect of prolonged drought on Northern Bobwhite, overwintering waterfowl, owls and migratory birds, and resident species in Texas and neighboring states.

What caused hundreds of Blackpoll Warblers, Connecticut Warblers, and other birds to be killed at a wind farm in West Virginia during their fall migration.

Why Inca Dove, Lucy's Warbler, Brown-crested Flycatcher, and many other western and southwestern bird species turned up east of the Mississippi River in October and November 2011.

Why the American Ornithologists’ Union and other Western Hemisphere ornithological societies want to merge, forming a new group to be called the Society for Ornithology. 

How the Southeastern Arizona Bird Observatory teamed up with Kaytee Wild Bird Products and Cedar Works Feeders to make free feeders and nectar available to hummingbirds after summer wildfires destroyed natural food sources.

How a storm-petrel and a shearwater -- seabirds discovered under widely different circumstances -- became the latest additions to the list of the world's known bird species.

How light-level geolocators provided researchers with revolutionary new insights into the migration and winter ecology of the Veery.

Why scientists believe Barn Swallows breeding in Buenos Aires Province, Argentina, may represent not only a range expansion but a rare col­onization of a continent. 

How researchers and the public can help the U.S. Fish and Wildlife Service determine whether the Eskimo Curlew, listed since 1967 as endangered, should be reclassified as extinct.

What scientists who studied the Green-backed Firecrown in Chile learned about the ability of hummingbirds to remember which flowers provide the best nectar — and when.

How officials ramped up efforts to shrink the population of Canada Geese in and around New York City since 2009, when a passenger jet collided with geese and landed in the Hudson River.

Which warbler species were moved, which genera were done away, and which bird species were added to the latest checklist published by the American Ornithologists' Union.

Cave Creek Canyon is still open for business

Birds perform a multitude of services that contribute to our well-being

Why Whooping Cranes in the eastern population receive less protections than cranes in the west