American Society of Ichthyologists and Herpetologists (ASIH)
ASIH is dedicated to the scientific study of fishes, amphibians and reptiles. The primary emphases of the Society are to increase knowledge about these organisms, to disseminate that knowledge through publications, conferences, symposia, and other means, and to encourage and support young scientists who will make future advances in these fields.

Association of Zoos and Aquariums
A network of more than 6,000 committed zoo and aquarium professionals, organizations and suppliers world-wide.

Animal Welfare Information Center (AWIC)
A division of the US Department of Agriculture, AWIC is mandated by the Animal Welfare Act (AWA) to provide information for improved animal care and use in research, testing, teaching, and exhibition.

Association for Tropical Biology and Conservation (ATBC)
ATBC was founded in 1963 to promote research and to foster the exchange of ideas among biologists working in tropical environments. ATBC has built its reputation on the publication of a high-quality, widely-cited journal, Biotropica, and on the sponsorship of international symposia on diverse tropical issues.

Association of Field Ornithologists (AFO)
AFO is a society of professional and amateur ornithologists dedicated to the scientific study and dissemination of information about birds in their natural habitats. Founded in 1922 as the Northeastern Bird-banding Association, AFO continues to be especially active in bird-banding and development of field techniques. Additionally, AFO encourages participation of amateurs in research, and emphasizes conservation biology of birds. The geographic focus is the Western Hemisphere, with contributions to the ornithology of the Neotropics particularly encouraged. The Association's annual meetings and its quarterly Journal of Field Ornithology reflect these goals.

Audubon Society
Named after John James Audubon, the American ornithologist, naturalist, and wildlife painter, the National Audubon Society is a non-profit organization dedicated to the conservation and restoration of natural ecosystems, focusing on birds and other wildlife for the benefit of humanity and the earth's biological diversity. With a rich history dating back to 1905, NAS has since become an international institution with 550,000 members and over 500 Audubon Chapters.

Bagheera
Bagheera endangered species site is a place where people can learn more about the endangered species issues, and then, should they choose, be a voice to help save the animals from becoming extinct.

BBC Nature Online
A site for anyone interested in animals and the natural world around them. Brimming with wild life videos, games and competitions. Produced by the world renowned BBC Natural History Unit.

Biogems
The BioGems initiative, a project of the Natural Resources Defense Council (NRDC), is aimed at saving wildlands of exceptional natural values. The twelve BioGems featured here span North and Central America; the site also features a watchlist of South American wildlands under threat. All of these natural treasures are imperiled by logging, mining, oil drilling or other commercial exploitation. We have selected these BioGems not only for their ecological importance and their imminent plight, but also because well-coordinated web activism by people like you can make a very big difference in saving them.

BirdLife International
BirdLife International is a global Partnership of conservation organisations that strives to conserve birds, their habitats and global biodiversity, working with people towards sustainability in the use of natural resources.

BIRDNET
The ornithological information source sponsored by the Ornithological Council, a public information organization founded by seven North American Professional Ornithological Societies.

Butterfly Web Site
The Butterfly Website is the world's oldest and largest website dedicated to butterflies and moths. Here you'll find hundreds of articles about butterflies and moths, an extensive clipart collection, many photographs, videos, butterfly gardening tips, links to purchase butterflies for your wedding or special event, and a lot more.

Center for Biological Diversity
The Center for Biological Diversity works through science, law and creative media to secure a future for all species, great or small, hovering on the brink of extinction.

Conservation International (CI)
CI focuses on trying to preserve and promote awareness about the world's most endangered biodiversity through scientific programs, local awareness campaigns, and economic initiatives. CI also works with multinational institutions, provides economic analyses for national leaders, and promotes "best practices" that allow for sustainable development.

Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES)
CITES is an international agreement between governments. Its aim is to ensure that international trade in specimens of wild animals and plants does not threaten their survival.

Defenders of Wildlife
Defenders of Wildlife is dedicated to the protection of all native wild animals and plants in their natural communities. We focus our programs on what scientists consider two of the most serious environmental threats to the planet: the accelerating rate of extinction of species and the associated loss of biological diversity, and habitat alteration and destruction.

Earth Island Institute
Site provides in-depth information and resources from our project network, award-winning journalism from the Earth Island Journal, and tools to address the environmental challenges we face.

Endangered Species Coalition
The Endangered Species Coalition is a national network of hundreds of conservation, scientific, education, religious, sporting, outdoor recreation, business and community organizations working to protect our nation’s disappearing wildlife and last remaining wild places.

EnviroLink
The EnviroLink Network is a non-profit organization which has been providing access to thousands of online environmental resources since 1991.

Environment B2B
Encompassing environmental groups, organizations, agencies and companies. Categories include environmental jobs, biodiversity, air quality, global change, environmental health, education, environmental law, hazardous waste.

Environmental Investigation Agency (EIA)
EIA was established in 1984 to investigate, expose and campaign against the illegal trade in wildlife and the destruction of our natural environment. The European Centre for Nature Conservation (ECNC) is established in 1993 with the purpose to further European nature conservation by bridging gap between science and policy. ECNC has become a renowned expertise centre offering support to the development, review and implementation of European nature conservation policies.

European Centre for Nature Conservation (ECNC)
The conservation and sustainable use of Europe’s nature and biodiversity is ECNC's core business.

Forests Forever
Mission: To protect and enhance the forests and wildlife habitat of California through educational, legislative and electoral activities. Second, our Mission is to recruit, educate and train articulate and effective organizers in the skills needed to convey our position on the state's forests and wildlife habitat to the citizens of California.

Friends of the Earth International
The largest international network of environmental groups in the world, represented in 61 countries--uniting close to 1 million activists internationally.

Great Outdoor Recreation Pages (GORP)

Greenpeace International
Greenpeace is an independent, campaigning organisation which uses non-violent, creative confrontation to expose global environmental problems, and to force the solutions which are essential to a green and peaceful future. Greenpeace's goal is to ensure the ability of the earth to nurture life in all its diversity.

Harvard Museum of Natural History
The Harvard Museum of Natural History (HMNH) is the public museum of Harvard University's three natural history institutions: the Botanical Museum, the Museum of Comparative Zoology, and the Mineralogical and Geological Museum. This complex features exhibitions, public programs, and educational resources that reflect the collections and research of the four parent museums.

Herpetologists' League
The Herpetologists' League, established in 1946, is an international organization of people devoted to studying herpetology -- the biology of amphibians and reptiles.

Honor the Earth
A national foundation and advocacy organization that supports front line Native environmental work. Our mission is to increase funding and public support for Native communities protecting the Earth we all share.

International Rivers Network
The IRN web site is a global resource for all people who share our concern for protecting and restoring the world's rivers and ensuring respect for the rights of riverine communities. The site provides activists throughout the world with important, in-depth background and current information on river campaigns.

Integrated Taxonomic Information System (ITIS)
A US federal program, ITIS is an authoritative taxonomic information source on plants, animals, fungi, and microbes of North America and the world.

International Species Information System (ISIS)
ISIS is an international non-profit membership organization (U.S. 501c3) which serves nearly 500 zoological institutional members, from 54 countries, worldwide. ISIS supports conservation and preservation of species, by helping member facilities manage their living collections.

National Wildlife Federation (NWF)
NWF is the nation's largest member-supported conservation group, uniting individuals, organizations, businesses and government to protect nature, wildlife and the world we share.

Natural Resources Defense Council (NRDC)
NRDC's purpose is to safeguard the Earth: its people, its plants and animals, and the natural systems on which all life depends. We work to restore the integrity of the elements that sustain life -- air, land, and water -- and to defend endangered natural places. We seek to establish sustainability and good stewardship of the Earth as central ethical imperatives of human society. NRDC affirms the integral place of human beings in the environment.

Natural Science Collection Alliance
The Natural Science Collections Alliance is a Washington, D.C.-based nonprofit association that supports natural science collections, their human resources, the institutions that house them, and their research activities for the benefit of science and society.

Nature Conservancy
Founded in 1951, The Nature Conservancy is the world's leading private, international conservation group. It preserves habitats and species by saving the lands and waters they need to survive. The 1-million-plus members have helped protect more than 11 million acres of habitat in the United States and nearly 60 million acres in Canada, Latin America, the Caribbean, Asia and the Pacific. It currently manages 1,340 preserves, the largest system of private nature sanctuaries in the world.

Naturenet
Naturenet is a voluntary enterprise to provide a good resource for practical conservation on the Web. Based in the UK, most of the information available on Naturenet relates to the UK, particularly England, but also includes references to other countries. Naturenet is intended for those interested in the countryside, its management, and nature conservation. As well as anyone who enjoys visiting the countryside this includes ecologists, rangers, wardens, volunteers, students, tree wardens, biologists, birdwatchers, land agents and farmers.

NatureServe
NatureServe is a network connecting science with conservation in an Online Encyclopedia of Life

InfoNatura: Birds and Mammals of Latin America

Oceania Project
Non-profit education and research organisation dedicated to raising awareness about Cetacea (whales, dolphins and porpoises) and the ocean environment.

Pesticide Action Network North America (PANNA)
Pesticide Action Network North America (PANNA) is a nonprofit citizen-based NGO that advocates adoption of ecologically sound practices in place of pesticide use. PANNA works with over 120 affiliated organizations in Canada, Mexico and the U.S., and more than 400 PAN partner groups around the world, to promote sustainable agriculture, food security and social justice, and demand that development agencies and governments redirect support from pesticides to safe alternatives.

Rainforest Action Network (RAN)
Founded in 1985, Rainforest Action Network (RAN) has been working to protect tropical rainforests and the human rights of those living in and around those forests.

Royal Society for the Protection of Birds (RSPB)
RSVB is Europe's largest wildlife conservation charity, supported by over 1,000,000 members, including over 150,000 under 18 years old.

Shark Trust
For all those interested in the marine environment and the facinating group of animals known as sharks, this is the site for you. Established in 1997, the Shark Trust promotes the study, management and conservation of sharks, skates and rays.

Sierra Club
Since 1892, the Sierra Club has been working to protect communities, wild places, and the planet itself. We are the largest and most influential grassroots environmental organization in the United States, founded by John Muir.

Smithsonian Institution, National Museum of Natural History

Spanish Ornithological Society (SEO)

TRAFFIC
TRAFFIC is the wildlife trade monitoring programme of WWF-World Wide Fund for Nature and IUCN-The World Conservation Union.

Tree of Life
A distributed Internet project containing information about phylogeny and biodiversity.

Union of Concerned Scientists (UCS)
UCS is an independent nonprofit alliance of 50,000 concerned citizens and scientists across the country. We augment rigorous scientific analysis with innovative thinking and committed citizen advocacy to build a cleaner, healthier environment and a safer world.

United Nations Educational, Scientific and Cultural Organization (UNESCO)
UNESCO was established in 1945, has its headquarters in Paris, and 73 field offices and units in different parts of the world.

United Nations Environment Programme (UNEP)

U.S. Fish and Wildlife Service

U.S. National Park Service

Fundación Vida Silvestre Argentina
Wilderness foundation of Argentina, dedicated to preserving the nation's wildlife.

Wetlands International
The organization;s mission is to sustain and restore wetlands, their resources and biodiversity.

Whale and Dolphin Conservation Society (WDCS)
Global voice for the protection of whales, dolphins and their environments.

Wildlands Project
The mission of The Wildlands Project is to protect and restore the natural heritage of North America through the establishment of a connected system of wildlands.

Wilderness Society
Only US national conservation organization that is devoted primarily to public lands protection and management issues. Headquartered in Washington, DC, the Society employs a combination of advocacy, analysis, and public education in its campaigns to improve management of America's national parks, forests, wildlife refuges, Bureau of Land Management lands, and other natural places.

World Conservation Union/International Union for the Conservation of Nature (IUCN)
IUCN's mission is to influence, encourage and assist societies throughout the world to conserve the integrity and diversity of nature and to ensure that any use of natural resources is equitable and ecologically sustainable.

World Endangered Species

World Resources Institute
World Resources Institute provides information, ideas, and solutions to global environmental problems.

World Wildlife Fund Global Network (WWF)

Zoocheck Canada
Canadian animal protection charity established to protect wildlife in captivity and in the wild.

SPECIALIZED BOOKSTORES ON THE WEB
Conservation Biology, Quantitative Ecology, Natural History, Environmental Science, Ecotourism

Buteo Books, specializing in ornithology.

Longitude Books, ecotourism

Natural History Book Service

Oryx (Barcelona)

University of Chicago Press: Biological Sciences

Zoo Book Sales / Serpent's Tale NHBD, natural history books from around the world.