The vast majority of tricolored blackbirds are currently found in California's Central Valley. The organization devoted to the acquisition and dissemination of information on birds in the Central Valley is the Central Valley Bird Club.
Members of the Central Valley Bird Club are dedicated to the study of the distribution, status, ecology and conservation of birds in California's Central Valley. In 2004 the Central Valley Bird Club published a special edition of its Bulletin devoted to the tricolored blackbird.
Sustainable Conservation, a San Francisco-based non-governmental organization, coordinates the Tricolored Blackbird Working Group and facilitates Working Group meetings. Sustainable Conservation has a web page that describes its work with the tricolored blackbird and the Working Group.
The American Bird Conservancy (ABC) is a non-governmental organization devoted to conserving native wild birds and their habitats throughout the Americas. The tricolored blackbird is a Red List species on the ABC WatchList
BirdWeb, a portal to learn about the birds of Washington State hosted by the Seattle Audubon Society, features a page on the most northerly breeding populations of the tricolored blackbird
The World Conservation Union, or IUCN, is an international non-governmental organization that maintains a list, the Red List, of threatened and endangered species. The tricolored blackbird was listed as Endangered on the 2006 IUCN Red List
Audubon California is a non-governmental organization formed in 1997 as the National Audubon Society's California Field Office. The Audubon California website has several pages pertaining to the tricolored blackbird, including one describing the successful conservation of a large breeding colony in Riverside County in 2006.
The National Audubon Society is a non-governmental organization that seeks to conserve and restore natural ecosystems, focusing on birds and other wildlife. The National Audubon Society maintains a "WatchList" of birds of particular conservation importance, including the tricolored blackbird
Partners in Flight is a cooperative effort involving partnerships among federal, state and local government agencies, philanthropic foundations, professional organizations, conservation groups, industry, the academic community, and private individuals. Parters in Flight hosts a tricolored blackbird Watch List page. See also the California Partners in Flight Riparian Bird Conservation Plan account of the tricolored blackbird.
The California Department of Fish & Game webite provides much information on the tricolored blackbird and uses the locations of tricolored blackbird nesting colonies as the basis for a tutorial of its Biogeographic Information and Observation System, or BIOS.