State of the birds USA 2004
| Author: | National Audubon Society | |
| Date: | 2004 | |
| Periodical: | Audubon Magazine | |
| Link: | http://www.audubon.org/bird/stateofthebirds/ | |
| Abstract: | This report sums up the status of 654 bird species native to the continental United States according to the country's four major types of natural habitat—grass, shrubs, trees, and water. Urban habitat, which is increasing more rapidly than any other type, is also included; the ability of birds to adapt to it has become a major factor for their survival. An additional 46 species native to the continental United States use a variety of habitats and were not part of the analysis. | |
