The United States of America, also known as the United States, the U.S., the U.S.A., the U.S. of A, the States, and America, is a country in North America. A federal republic, the United States shares land borders with Canada and Mexico, and extends from the Atlantic Ocean to the Pacific Ocean. Its capital is Washington, D.C.
The present-day continental United States has been inhabited for at least 15,000 years by Native Americans. After 16th-century European exploration and settlement, the English established new colonies, and gained control of others, in the eastern portion of the continent in the 17th and early 18th centuries. On 4 July 1776, at war with Britain over fair governance, thirteen of these colonies declared their independence; in 1783, the war ended in British acceptance of the new nation. Since then, the country has more than quadrupled in size: it now consists of 50 states, one federal district, and a number of overseas territories.
At over 3.7 million square miles (over 9.1 million km²), the U.S. is the third largest country by area. It is also the world's third most populous nation, with nearly 300 million people.
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Science and Environment :: United States
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All Experts Birding - A panel of US birders volunteer to answer questions.
Meta Description: [ About AllExperts: expert guidance from real people helping to answer your questions ]
American Bird Conservancy - A not-for-profit dedicated to the conservation of wild birds and their habitats in the Americas.
Meta Description: [ American Bird Conservancy Homepage ]
BBIRD - Breeding Biology Research and Monitoring Database - A national, cooperative program that uses standardized field methodologies for studies of nesting success and habitat requirements of breeding birds.
Meta Description: [ Breeding Biology Research and Monitoring Database ]
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Bird Checklists of the United States - Hundreds of seasonal occurrence bird checklists for state, federal, and private management areas, nature preserves, and other areas of special interest in the United States.
Meta Description: [ Hundreds of checklists indicating the seasonal occurrence of birds in state, federal, and private management areas, nature preserves, and other areas of special interest in the United States and nearby countries ]
BirdBrain - A birding portal with learning games, links to news articles, photos, sound files, and links.
BirdCentral - Photo gallery by Jim Rosso; birds in the classroom project.
Birding Tidbits - Crossword puzzles.
BirdingGuide.com - Information, resources, and links for bird watching.
BirdPerch - Photo gallery, magazine photo index, and list of places to bird.
Birds: Bellwethers of Watershed Health - Educational resource on the importance of birds as watershed health indicators and how to improve watershed conditions.
BirdWatch - PBS television series on birds and birdwatching.
Meta Description: [ This Web site, provided by the Public Broadcasting Service (PBS), is home to more than 350 television show companion sites in addition to Web-original sites. PBS Online hosts interactive content for everyone including kids, parents, educators, and the general audience. ]
Birdwatch America - Supports the business of birding in the US.
Birdwatching in the National Parks - Links to articles and checklists for finding birds on National Park Service land throughout the US.
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Guide to Birds of North America - Method to identify birds from a database containing 799 birds of North America using attributes such as shape, size, habitat, pattern, and color.
Identification Issues - Don Roberson's detailed discussions and photos of 10 ID problems, mainly dealing with California birds.
National Birder's Forum - Chat for beginning birders.
Meta Description: [ nationalbirdersforum: National Birder's Forum - Back in Action ]
New England Seabirds and Pelagic Birding - Conservation news, checklists of birds and mammals, birding spots, pelagic trips and trip reports, seabird breeding colonies, and tips for a first pelagic trip.
Meta Description: [ Pelagic birding in New England and conservation of seabirds. Natural history of shearwaters, jaegers, storm-petrels. Historical pelagic trip and seawatch data. Pelagic birding trips with Brookline Bird Club, Audubon Society, South Shore Bird Club, and other New England bird clubs. Hints for... ]
Northern Prairie Wildlife Research Center - Large number of articles with detailed information about United States birds.
Nutty Birdwatcher - Eastern U.S. site with tips for backyard birding, bird migration table, and identification guides.
Meta Description: [ The Nutty Birdwatcher offers information on birdwatching, Eastern US Birds, wild bird food feeder preferences, suet receipes, natural foods of birds, backyard bird feeding, spring and fall bird migration timetables, North American Flyway maps, the do's & dont's of building bird nestboxes, compreh... ]
Robert Winkler - Nature Writing - Excerpts, reviews, bird photos, and links from the author of Going Wild: Adventures with Birds in the Suburban Wilderness
Meta Description: [ Essays on birds (eagles, owls, warblers, bird songs), other animals, walking and the natural landscape. Also nature art, links, quotes, book reviews, outdoor photography articles. ]
Scouting for Birds - Promotes the Boy Scouts' Bird Study Merit Badge, with guides for scouts and teachers.
SEPART-L - Archives and subscription management for the e-mail group for discussion of neotropical migratory birds in the southeastern United States.
State Birds - Official birds for each US state with illustrations and descriptive text by Audubon.
Meta Description: [ Directory of Official US State Birds ]
State Birds - The official state birds of every state and tips on how to find them.
Meta Description: [ The Official State Birds of every state, and some tips on how you and your family can find and identify them. ]
Trochilids - Winter western hummingbird reports from Mississippi, Louisiana, and the eastern US.
Meta Description: [ Annual maps and tallies for North American hummingbirds which spend the fall and winter outside what was considered their normal range -- such as Rufous Hummingbirds wintering in the Eastern USA. ]
Ya Know You're a Birder - Bird comics and backyard birding.
Meta Description: [ Bird watching comics about birds and birdwatching that any birder will enjoy. ]
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