Goodbye Northwestern Crow, Hello Mexican Duck
The latest supplement to AOS’s Checklist of North and Middle American Birds includes major updates to the organization of the continent’s bird species.
How Does Habitat Fragmentation Affect Amazonian Birds?
The Biological Dynamics of Forest Fragments Project began in 1979 and is the world’s longest-running experimental study of tropical forest fragments.
Climate Change May Be Making Migration Harder By Shortening Nightingales’ Wings
The Common Nightingale, known for its beautiful song, breeds in Europe and parts of Asia and migrates to sub-Saharan Africa every winter.
Is Intensive Agriculture Reducing Mourning Dove Reproduction in the Eastern U.S.?
Populations of some common bird species, including the familiar Mourning Dove, have been on the decline for decades in North America.
Fifty Years of Data Show New Changes in Bird Migration
New research shows that fall migration patterns have been shifting over time.
Biologists Recommend Urgent Action to Protect California Spotted Owls
In the Pacific Northwest, the range expansion of Barred Owls has already contributed to a conservation crisis for Northern Spotted Owls.
Red-winged Blackbird Nestlings Go Silent When Predators Are Near
If you’re a predator that eats baby birds — say, an American Crow — eavesdropping on the begging calls of nestlings can be an easy way to find your next meal.
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.
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 …
Urban Living Leads to High Cholesterol… in Crows
Animals that do well in urban areas tend to be the ones that learn to make use of resources such as the food humans throw away. But is our food …