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Home Archives for AOS Page 25
small brown bird
The Pale-bellied Tapaculo (Scytalopus griseicollis) was one of the species examined in the new study. Photo by Daniel Uribe, Birding Tours Colombia.
23 March 2020

AOS

Scytalopus Tapaculos, a Continental Non-Adaptive Radiation

Birds in the tapaculo genus Scytalopus are a perennial source of headaches for ornithologists interested in species limits.

a dove's wing being held in a spread position by a researcher
A Mourning Dove’s age can be determined from the pattern of feathers on its wing. Photo by David Muñoz.
11 March 2020

AOS

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.

eleven individual photos of different colorful songbird species
Eleven species of Neotropical migrants that were the focus of this study. Photos by Nick Bayly.
10 March 2020

AOS

Is the Darién Region of Colombia a Migratory Bottleneck for Neotropical Migrants?

Our passion for migratory birds and curiosity to reveal the mysteries of migration took us to one of the most spectacular regions of Colombia: the Darién.

a small brown, white, and yellow bird being safely held by a researcher
Dickcissels were among the birds eating pest insects in cornfields. Photo by Daryl Coldren.
06 March 2020

AOS

Birds Provide a Boost to Corn but Not Soybean Crops in the Midwest

The Midwest’s vast seas of corn and soybeans are not known for their bird abundance or diversity, but if you look in the right places, the birds are there.

a small green bird with a long, curved bill
Olive Sunbirds and other African sunbird species provide significant ecosystem services for humans. Photo by Bill Newmark.
02 March 2020

AOS

A Utilitarian Argument for Sunbird Conservation

I can distinctly remember why I became interested in the number and relative frequency of food plants for African sunbirds that are useful to humans.

a group of researchers sitting around a campsite
Tapaculo researchers in the field in 1985. Photo by Ken Rosenberg.
26 February 2020

AOS

Three New Pieces to the Tapaculo Puzzle Provide A Window Into Andean Species Diversity

Unraveling the mysteries of Neotropical bird diversity has captured the attention of scientists for more than 100 years.

small hawk in flight, viewed from beneath
A Sharp-shinned Hawk in flight. Photo by Ted Keyel.
24 February 2020

AOS

How Do Raptors’ Diets Affect Their Mercury Exposure?

It was my experiences as a hawk counter that first drew me to studying raptors as a master’s degree student at the University of Minnesota-Duluth.

white swan with black neck and head and a baby swan on its back
Black-necked Swan with cygnets. Photo by Felipe Dreves.
21 February 2020

AOS

Pinnipeds Can Create Conservation Challenges When Birds Are on the Menu

When hungry sea lions started using an important wetland in Chile like an all-you-can-eat swan buffet, local authorities were taken by surprise.

small blue, black, and white bird perched on a mossy tree trunk
Black-throated Blue Warblers have shifted the timing of their spring and fall migrations over the past fifty years. Photo by Kyle Horton.
20 February 2020

AOS

Fifty Years of Data Show New Changes in Bird Migration

New research shows that fall migration patterns have been shifting over time.

a small white fungus with bites missing, in front of a background of dirt and leaves
A truffle partially eaten by birds. Photo by Matthew Smith.
19 February 2020

AOS

Birds & Truffles in Chile’s Temperate Rainforests

How does a fungal ecologist end up getting a grant from an ornithological society?

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