The American Bison Society (ABS) was founded in 1905 by pioneering conservationists and sportsmen including Ernest Harold Baynes, William T. Hornaday and Theodore Roosevelt to help save the bison from extinction and raise public awareness about the species.

The Australian Society for Fish Biology (ASFB) is a professional organisation of fish and fisheries researchers. Founded in 1971, the society describes itself as a "professional, independent, non-profit, non-commercial and non-aligned organisation." The Australian Society for Fish Biology holds annual conferences for its members, sometimes in partnership with related organisations such as the Oceania Chondrichthyan Society and the Australian Society for Limnology. Former presidents of the society include Hamar Midgley (1977–79), Gerry Allen (1979–81), Julian Pepperell (1991–93) and Bronwyn Gillanders (2012–13).

The Caribbean Initiative is the most recent initiative of the IUCN.

The Census of Marine Life was a 10-year, US $650 million scientific initiative, involving a global network of researchers in more than 80 nations, engaged to assess and explain the diversity, distribution, and abundance of life in the oceans. The world's first comprehensive Census of Marine Life — past, present, and future — was released in 2010 in London. Initially supported by funding from the Alfred P. Sloan Foundation, the project was successful in generating many times that initial investment in additional support and substantially increased the baselines of knowledge in often underexplored ocean realms, as well as engaging over 2,700 different researchers for the first time in a global collaborative community united in a common goal, and has been described as "one of the largest scientific collaborations ever conducted".

The Conservation Foundation is a non-governmental, not-for-profit 501(c)(3) organization with a mission to preserve open space and natural lands, protect rivers and watersheds, and promote stewardship of the environment.

The Dreamworld Wildlife Foundation (DWF) is an international non-governmental organization founded in 2012. The foundation is based at the Dreamworld amusement park on the Gold Coast, Australia. DWF primarily focuses on animal welfare.

Ecocity Builders is a 501c non profit located in Oakland, California that provides advocacy, consulting, and education in sustainable city planning with a focus on access by proximity and pedestrian-oriented development. Ecocity Builders also implements urban design projects utilizing a large network of alliances with city governments, businesses and NGOs. Ecocity Builders' approach is based the work of founder Richard Register, an American artist, peace activist and urban theorist.

The Ecological Society of America (ESA) is a professional organization of ecological scientists. Based in the United States and founded in 1915, ESA publications include peer-reviewed journals, newsletters, fact sheets, and teaching resources. It holds an annual meeting at different locations in the USA and Canada. In addition to its publications and annual meeting, ESA is engaged in public policy, science, education and diversity issues.

Field Studies Council (FSC) is an educational charity based in the UK, which offers opportunities for people to learn about and engage with the outdoors.

The German Green Belt is a project of Bund Naturschutz (BUND), one of Germany's largest environmental groups. The project began in 1989 facing a forbidding, 870-mile (1,400 km) network of fences and guard towers once ran the length of Germany, separating East and West. Now, one of the world's most unusual nature reserves is being created along the old "Death Strip," turning a monument to repression into a symbol of renewal.

The Global Biodiversity Information Facility (GBIF) is an international organisation that focuses on making scientific data on biodiversity available via the Internet using web services. The data are provided by many institutions from around the world; GBIF's information architecture makes these data accessible and searchable through a single portal. Data available through the GBIF portal are primarily distribution data on plants, animals, fungi, and microbes for the world, and scientific names data.

The Institute of Ecotechnics is an educational, training and research charity with a special interest in ecotechnology, the environment, conservation, and heritage. With its U.K. headquarters in London, England and its U.S. affiliate in Santa Fe, NM, the institute was founded to "develop and practice the discipline of ecotechnics: the ecology of technics, and the technics of ecology."

The Jasper Ridge Biological Preserve is a 483 hectares nature preserve and biological field station formally established as a reserve in 1973. The biological preserve is owned by Stanford University, and is located at 37.408°N 122.2275°W south of Sand Hill Road and west of Interstate 280 in Portola Valley, San Mateo County, California. It is used by students, researchers, and docents to conduct biology research, and teach the community about the importance of that research. The preserve encompasses Jasper Ridge and Searsville Lake and the upper reaches of San Francisquito Creek, along with the latter's Corte Madera Creek and Bear Creek tributaries.

Mestnye is a Russian political movement of young ecologists that was formed on October 19, 2005. Its full description in Russian is Движение молодых политических экологов "Местные". The Locals are a Kremlin project created to oversee independent ecological movements such as the Baikal Movement and Green Russia.

National Ecological Observatory Network (NEON) is a large facility program operated by Battelle Memorial Institute and funded by the National Science Foundation. In full operation since 2019, NEON gathers and provides long-term, standardized data on ecological responses of the biosphere to changes in land use and climate, and on feedback with the geosphere, hydrosphere, and atmosphere. NEON is a continental-scale research platform for understanding how and why our ecosystems are changing.
The "No fem el CIM" (NFC) movement was founded in 2003 in the Penedès region of Catalonia. It was then that locals learned that the Catalan government wanted to construct a dry port between the towns of Banyeres del Penedès, l'Arboç i Sant Jaume dels Domenys. However, it was not until August 2005 that the movement began to take-off, gaining national recognition, spurred by the release of the government's 544 acre plan for the inland port. Since then, members of the movement have held numerous protests as well as meetings with local and national government entities in an attempt to prevent dry port construction.

Ocean Elders is a worldwide group of activists dedicated to protecting the ocean, wildlife, and nature itself. The group promotes the expansion of existing marine protected areas and the creation of new ones. The group maintains that this will allow marine ecosystems to recover from the effects caused by human activities. The group includes scientists, musicians, business leaders, royalty, and country leaders.

rECOrd is a Local Biological Records Centre (LRC) serving Cheshire, Halton, Warrington and Wirral - 'The Cheshire region'. It provides a local facility for the storage, validation and usage of Cheshire-based biological data under the National Biodiversity Network (NBN) project. It is one of a number of local Biological Records Centres across Britain which together aim to give complete geographic coverage of the UK.

Reef Ball Foundation, Inc. is a 501(c)(3) non-profit organization that functions as an international environmental non-governmental organization. The foundation uses reef ball artificial reef technology, combined with coral propagation, transplant technology, public education, and community training to build, restore and protect coral reefs. The foundation has established "reef ball reefs" in 59 countries. Over 550,000 reef balls have been deployed in more than 4,000 projects.

The Rocky Mountain Biological Laboratory is a high-altitude biological field station located near Crested Butte, in the West Elk Mountains in the abandoned mining town, Gothic, Colorado, US. The laboratory was founded in 1928. Research areas include the ecology of the region, climate change, pollination biology and a long-running study of the yellow-bellied marmot. The laboratory offers courses for undergraduate students, including National Science Foundation-funded REU students, and provides support for researchers from universities and colleges.

The University of Edinburgh School of GeoSciences, is a school within the College of Science and Engineering, which was formed in 2002 by the merger of four departments. It is split between the King's Buildings and the Central Area of the university. The institutes of Ecological Sciences and Earth Science are located at the King's Buildings, whilst the Institute of Geography is located on Drummond Street in the Central Area. In 2013 the department was ranked 8th best place to study Geography in the country by The Guardian University Rankings, down from 2nd in 2006.

The Wetlands Initiative (TWI) is a non-profit conservation organization headquartered in Chicago, Illinois, United States. The Wetlands Initiative works with nonprofit and government partners and local communities to advance wetland restoration and science in the Midwestern United States. The organizational vision of TWI is: "A world with plentiful healthy wetlands improving water quality, climate, biodiversity, and human well-being."

Wild Ones: Native Plants, Natural Landscapes is a non-governmental, not-for-profit 501(c)(3) organization with a mission to promote environmentally sound landscaping practices and preserve biodiversity.

The World Wide Fund for Nature (WWF) is an international non-governmental organization founded in 1961 that works in the field of wilderness preservation and the reduction of human impact on the environment. It was formerly named the World Wildlife Fund, which remains its official name in Canada and the United States.