Testing Tree Swallow Nestlings’ Parasite Susceptibility
In many bird species, the eggs in a clutch don’t necessarily hatch at the same time, creating a hierarchy of size within broods.
Tag: research
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.
Taking a Closer Look at Bird–Window Collisions
You have probably heard the startling impact of a bird hitting a glass pane, or perhaps you’ve come across a dead bird beneath a window. While the effect on the bird was lethal, you were likely affected by that event too.
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.
Unraveling the Mystery of the Long-whiskered Owlet
Every museum has its “greatest hits” tour — those specimens steeped in museum lore that you show off to visitors.
What a Fossil Foot Can Teach Us About Ancient Relatives of Cranes
In ancient Chinese mythology, cranes were said to carry the souls of the dead to paradise.
How Did a Volcanic Eruption Affect Andean Condors?
After a catastrophic natural event such as a volcanic eruption, what happens to the birds that live in the affected area?
Are Aggregate Pits a “Trap” for Nesting Bank Swallows?
Sand and gravel pits may seem like an unlikely place to nest, but they greatly resemble Bank Swallows’ natural habitat along rivers and lakeshores.
Why Do Rough-legged Hawks Nest Next to Peregrine Falcons?
Different raptor species in the Arctic nest at least 700 to 1,800 meters apart — except for the Rough-legged Hawk.
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.