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a gray, black, and white goose with a fluffy gray nestling, nestled on the ground in tundra habitat
Barnacle Goose with chick. Photo by Michiel Boom.
05 November 2019

AOS

Who Wins in a Warmer Arctic—the Gosling or the Egg?

Global warming is increasingly affecting wild bird populations, and because the Arctic is warming more rapidly than any other part of the world, populations of Arctic migratory birds are potentially the most vulnerable.

yellowhammer
Yellowhammers are known for their varying song dialects. Photo by Petr Jan Juračka (petr.juracka.eu).
21 October 2019

AOS

What Can the “Little Bit of Bread” in Yellowhammer Song Tell Us?

Dialects, a well-known feature of human languages, can also be found in the vocalizations of various bird species.

red-cockaded woodpecker
A Red-cockaded Woodpecker visits its nest cavity. Photo by Stephanie DeMay.
16 October 2019

AOS

Red-Cockaded Woodpecker Nesting Season Meets Climate Change

Early in their ecology classes, students learn that plants and animals facing a changing climate have three options: adapt, move, or die.

female and male phainopepla
Female (left) and male Phainopeplas. Photo by Daniel Baldassarre.
15 October 2019

AOS

Rare Itinerant Breeding Behavior Revealed in California Bird

Reproduction and migration are the two most demanding tasks in a bird’s life, and the vast majority of species separate them into different times of the year.

lawrence's warbler
How do genetics determine the plumage patterns of hybrids such as Lawrence’s Warbler? Photo by B.N. Singh.
14 October 2019

AOS

New Genetic Techniques Are Improving Our Understanding of Plumage Color

Few groups of organisms possess striking visual displays that rival the bright colors and intricate patterns of bird feathers.

blood sample being taken from a swallow
Researchers take a blood sample from a swallow. Photo provided by Tara Imlay.
08 October 2019

AOS

Winter Experiences Carry Over into Swallows’ Breeding Success

There’s no shortage of studies demonstrating that conditions during one part of birds’ annual of breeding and migration cycle can affect individuals in subsequent stages — a phenomenon known as carry-over effects.

displaying prairie-chicken
Greater Prairie-Chickens occupy noisy habitat but avoid trees and row crops when living near a wind energy facility. Photo by Cara Whalen.
07 October 2019

AOS

Do Prairie-Chickens Care More About Land Cover or Wind Turbine Noise?

Imagine living in a grassland landscape with an almost constant low-frequency hum from spinning wind turbine blades. The humming is distracting, so what do you do?

song sparrow
Song Sparrows are among the birds tracked by researchers studying riparian restoration in California. Photo by Frank Lospalluto.
04 October 2019

AOS

Songbirds Indicate Short-Term Restoration Success

To understand the impact of restoration efforts, one of the things we can do is study the wildlife that lives in these human-restored habitats.

photo of hybrid hummingbird
A hybrid hummingbird captured in Happy Camp, California. Photo by Brian Myers.
17 September 2019

AOS

Researchers Identify Previously Unknown Hybrid Zone Between Hummingbird Species

We usually think of a species as being reproductively isolated – that is, not mating with other species in the wild. Occasionally, however, closely related species do interbreed. New research …

photo of Yellow-billed Duck male and hybrid female
Yellow-billed Duck male and hybrid female from Cape Town, South Africa. Photo by Jeffrey L. Peters.
06 September 2019

AOS

The Threat of a Green-Headed Monster

Affectionately known to some as the “green-headed monster,” the Mallard is one of the world’s most recognizable species of waterfowl.

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