http://www.nwi.fws.gov/mapper_tool.htm

North American Waterbird Conservation Plan
Plan de Conservaci≤n de las Aves Acußticas Norteamericanas
http://www.nacwcp.org/

Ducks Unlimited
http://www.ducks.org/

Ducks Unlimited Canada
http://www.ducks.ca/

National Wetlands Status and Trends
Humedales de AmΘrica del Norte
http://www.nwi.fws.gov/statusandtrends.htm

North American Wetlands Conservation Council
Consejo de Conservaci≤n de Humedales de AmΘrica del Norte
http://northamerican.fws.gov/nawcahp.html

U.S. wetlands news
Noticias de humedales de los EEUU
http://www.aswm.org/br-news.htm