Illinois Ornithological Society
Encyclopedia
The Illinois Ornithological Society (IOS) is the principal birding
Birdwatching
Birdwatching or birding is the observation of birds as a recreational activity. It can be done with the naked eye, through a visual enhancement device like binoculars and telescopes, or by listening for bird sounds. Birding often involves a significant auditory component, as many bird species are...

 and bird conservation organisation in the American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 state of Illinois
Illinois
Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...

. It produces a quarterly newsletter, Wings Over the Prairie, as well as a quarterly magazine, Meadowlark, A Journal of Illinois Birds.

The objectives of the IOS are to promote scientific research and education in order to improve knowledge and awareness of birds in Illinois, publish a journal and keep a permanent historical record of its bird life, maintain an up-to-date state checklist, and support the well-being of birds and birding in the state.

The IOS has a standing committee
Standing Committee
In the United States Congress, standing committees are permanent legislative panels established by the United States House of Representatives and United States Senate rules. . Because they have legislative jurisdiction, standing committees consider bills and issues and recommend measures for...

(Illinois Ornithological Records Committee), founded in 1985, which evaluates the evidence for records of birds that are rare or unusual in the state, and which is responsible for publishing and maintaining the official checklist of Illinois birds.
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