Biology

Photo Gallery: Meet The "Cosmopolitan" Birds That Occur All Over the World

Living Bird Magazine Who Wins at the Bird Feeder—the Lone Wolf or the Social Butterfly?

Living Bird Magazine To Catch Voles Under the Snow, Great Gray Owls Must Overcome an Acoustic Mirage

Living Bird Magazine How Do Cooper’s and Sharp-shinned Hawks Coexist in Backyards? FeederWatch Investigates

Living Bird Magazine Hairy Woodpeckers Use Body Language to Show Who's Boss

Living Bird Magazine The Coolest Hummingbird, as Measured by an Actual Thermometer

How Do Birds "Fall in Love"? A Look at Courtship Displays

Living Bird Magazine Do Birds Dream?

Living Bird Magazine In Africa, Sociable Weavers Build a Nest of Many Uses

Macaulay Library Recordings Help Unravel the Mystery of Mixed-Species Flock Leadership

Living Bird Magazine How Do Birds Survive the Winter?

Living Bird Magazine Female Birds-of-Paradise Go For Complex Males

Robots, Telemetry, and the Sex Lives of Wild Birds [video]

Project FeederWatch When 136 Bird Species Show Up at a Feeder, Which One Wins?

Project FeederWatch Who Is the Toughest Bird in Your Backyard?

Project FeederWatch Curiosity Killed the Cat, But Not the Corvid: Steller's Jay's Foraging Strategies

In a Flashy Species, Drab Young Males Find Their Own Route to Success With Females

Bird Population Studies Flying on Fumes: How Birds Meet Their Oxygen Demands at High Altitude

Living Bird Magazine A Noble Vision of Gulls

Project FeederWatch Bird Feeder Behavior Project: Find Out Who is Interacting with Whom

Where Is That Bird Going With That Seed? It's Caching Food for Later

Project FeederWatch Will Sing for Food: Well Fed Birds Sing More During the Dawn Chorus

Project FeederWatch “Anting” Behavior in Blue Jays

Macaulay Library Fairywrens Sing to Deter Cheating Mates

Project FeederWatch Tell us About Bird Behavior at Your Feeder

Project FeederWatch Chilly Air and Warm Hearts: Chickadee Winter Romance

Project FeederWatch Halloween Special: Titmouse Behavior is Affected by Face Masks

Bird Academy Clark’s Nutcrackers and the Trees They Depend On

Birds-of-Paradise Project Black Sicklebill: The Thin Blue Line

Project FeederWatch Northern Cardinals know how to shake their tail feathers

Vogelkop Bowerbird Decorates His Bower With Flowers

Black Skimmer Chicks Beg For Food With a Humorous Pose

Bird Academy Superb Lyrebird Might Be the Fanciest Bird in the World

Project FeederWatch Wintering Sparrows Balance Safety of Brush Piles Against Warmth of Sun

Project FeederWatch A dominant species in many arenas: the 12 gram Black-capped Chickadee

Project FeederWatch Chipping Sparrows help each other out with territory defense… sometimes

Power Struggles Are Playing Out at Your Feeder—Here's What to Look For

Birds-of-Paradise Project Bird-of-Paradise Spreads His Feather Skirt and Dances

Four Nuthatches, Four Ways to Make It Through a Cold Winter

Project FeederWatch Coping with Cold: A Bird’s Strategy

How to Recognize Duck Courtship Displays

Project FeederWatch Cooperative Breeding? In My Backyard?

Project FeederWatch The colors on backyard birds may mean more than we think

How Do Tired Birds Choose Where to Stop During Migration?

Brilliant Flash: Red-winged Blackbird Territorial Displays

Why Chickadees Grab Seeds and Go: Feeder Bird Strategies

Bird Academy Bird Academy

To Know the Crow: Insights and Stories From a Quarter-Century of Crow Study [Video]

Celebrate Urban Birds Focal Species Close-Up: Brown-headed Cowbirds

Bird Cams How Birds Survive the Cold: Feathers + Food = Warmth

Snowy Owl vs. Peregrine Falcon

Bird Academy Golden Eagle Flying Through Snow

Bird Academy The Distinctive Calls of Owls: A Sampler

Living Bird Magazine How Clark's Nutcrackers Find Buried Seeds Under a Blanket of Snow

Evolutionary Biology Infidelity in Australian Bird May Be the Secret Keeping a Species Together

Bird Academy Nutcrackers, Whitebark Pines, and Climate Change

Bird Academy On a Lek with Gunnison Sage-Grouse

Thump!: The Ruffed Grouse Mate Attraction Display

How Do Starling Flocks Create Those Mesmerizing Murmurations?

Bird Cams Great Horned Owl Twilight Visit to Sapsucker Woods Heron Nest

Bird Cams Two Ruffed Grouse Visit the Ontario FeederWatch Cam

Birds-of-Paradise Project Extreme Choosiness: the Many Phases of Courtship for a Greater Bird-of-Paradise

Birds-of-Paradise Project The Surprising Secret of the Twelve-wired Bird-of-Paradise's Strange Feathers

Birds-of-Paradise Project Inspection & Touch: and the Birds-of-Paradise

Birds-of-Paradise Project For Birds-of-Paradise, Life’s a Stage

Birds-of-Paradise Project Carola’s Parotia: King of the Dance

Birds-of-Paradise Project Paradise Riflebirds Need a Lot of Practice to Learn Their Display Dance

Birds-of-Paradise Project This Riflebird's Courtship Display Requires Fluid Coordination

Birds-of-Paradise Project Dance: and the Birds-of-Paradise

Birds-of-Paradise Project The Ballerina Dance of the Carola's Parotia Bird-of-Paradise

Birds-of-Paradise Project Superb Bird-of-Paradise: Psychedelic Smiley Face

Birds-of-Paradise Project Shape Shifting: and the Birds-of-Paradise

Birds-of-Paradise Project Taking a Closer Look: Inspection & Touch as Part of Courtship

Birds-of-Paradise Project Birds-of-Paradise That Can Change Shape Right Before Your Eyes

Courses Bird Behavior Online Course: Courtship and Rivalry (Preview)

Spoon-billed Sandpiper: Breeding Season

Bird Academy The Cutest Sandpiper? Watch Baby Spoon-billed Sandpipers Hatch

Bird Academy Spoon-billed Sandpiper: Foraging

Bird Academy Spoon-billed Sandpiper: Courtship

Bird Academy Loud and Goofy: Long-tailed Duck Territorial Calls

Comic Relief: Willow Ptarmigan Territorial Calls

New Book Tackles Old Question: Competition Between Bird Species

How Yellow-billed Loons Survive in the Arctic

How a Parrot Learns Its Name in the Wild

Bird Population Studies Acorn Woodpeckers Help Each Other in Times of Plenty

Shorebird Foraging Strategies

Foraging and Flocking: The Black-necked Stilt

Project FeederWatch What Are Feeder Birds Doing With All Those Seeds? Hi-Tech Tools Find Out

Macaulay Library Zoom!: The Aerial Display of the Common Nighthawk

Macaulay Library Inflatable Throat: Magnificent Frigatebird Mating Display

Bird Academy Real Angry Birds: Sharp-tailed Grouse Battle

Eastern Screech-Owl Camouflage

Students Interpreting Red-winged Blackbird Behavior

Wood Thrush Pair at Nest

Bird Academy Keeping the Peace: Threat Signals in Gull Colonies

Students Coordinated Cooperation: A Feeding Strategy that Reduces Nestling Competition

Students Shared Dynasties Among Acorn Woodpeckers

Students The Importance of Family for Western Bluebirds

In-Flight Albatross Cam Finds the Birds Feeding with Killer Whales

Video: Rooks Use Rocks to Reach Reward

Remember me? Crows do