American Ornithological Society

The American Ornithological Society (AOS) is an ornithological organization based in the United States. The society was formed in October 2016 by the merger of the American Ornithologists' Union (AOU) and the Cooper Ornithological Society. Its members are primarily professional ornithologists although membership is open to anyone with an interest in birds. The AOS is a member of the Ornithological Council and Ornithological Societies of North America (OSNA). The society publishes the two scholarly journals The Auk and The Condor as well as the AOS Checklist of North American Birds.

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Timing of spring birdsong provides climate insights

Climate change has scientists worried that birds' annual migration and reproduction will be thrown out of sync with the seasons. Because birds' songs are correlated with their breeding behavior and are easily identifiable ...

dateJan 17, 2018 in Ecology
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Genetic drift caught in action in invasive birds

Studies of island bird populations have taught us a lot about evolution, but it's hard to catch birds in the act of naturally colonizing new islands. Instead, a new study from The Auk: Ornithological Advances examines what's ...

dateJan 17, 2018 in Ecology
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Urban Cooper's hawks outcompete their rural neighbors

Depending on whether a species flourishes in a city environment, urban wildlife populations can be "sources" or "sinks," either reproducing so quickly that individuals leave to colonize the surrounding area or needing constant ...

dateDec 13, 2017 in Ecology
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Invasive frogs give invasive birds a boost in Hawaii

Puerto Rican coqui frogs were accidentally introduced to Hawaii in the 1980s, and today there are as many as 91,000 frogs per hectare in some locations. What does that mean for native wildlife? Concerns that ravenous coquis ...

dateNov 29, 2017 in Ecology
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Translocated hawks thrive in Hispaniola

Species translocation—capturing animals in one place and releasing them in another—is a widely used conservation method for establishing or reestablishing populations of threatened species. However, translocation projects ...

dateOct 25, 2017 in Ecology
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How many golden eagles are there?

For conservation efforts to be effective, wildlife managers need to know how many individuals of a species are out there. When species are spread out over large areas and occur at low densities, as is the case with the Golden ...

dateOct 18, 2017 in Ecology
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