| Basecamp Explorer: Showcases worldwide destinations and philosophy. Includes terms and conditions, and contact details. |
| Bio Explorations: Mission is to increase awareness and appreciation of the diversity of organisms that share the Earth. Includes schedules and contact details. |
| Crooked Trails: Non-profit, community-based travel organization promoting study tours, and village-based cultural exchanges with indigenous peoples in South America, Asia, and Kenya. |
| Cross Cultural Journeys: Offers travel opportunities for individuals and groups seeking personal and global awareness. |
| Discovery Initiatives: London agency offers unique holidays, including walking the wilderness trail and wildlife conservation programs. |
| Dolphin Charters: Rates and schedules for small group wildlife and photography cruises in southeast Alaska, California, Baja, British Columbia, Mexico, the Galapagos and San Francisco. |
| DreamWeaver Travel Company: Presents itineraries, guidelines, and travel ethics for guided tours to West Africa and South America. |
| Earth Routes: Provides worldwide destination and project information with links to travel advisories and home exchange opportunities. |
| Eco Trail: UK based operators of marine, mammal, and birding tours in Sri Lanka and Brazil. |
| Ecotourism Activity Guide: Information on ecotourism with links to associated activities and organizations. |
| Ecotourism at Conservation International: Presents listings of organisations and destinations worldwide. |
| Ecotrackers Foundation: Non-profit organization of international volunteers and students working to preserve the cultural and biological diversity of Ecuador. |
| Ecotravel.com: On-line magazine with directory of operators, lodges, private guides, organizations, and ancillary travel services.. |
| EcoVentures Nature Tours and Travel: Offering guided small group tours and customized tours for individual travelers. |
| Ecovolunteer: Information for travellers volunteering to participate in environmental projects worldwide. |
| Environmental Adventure Company: Providing tours and educational experiences for individuals and organizations, with guide profiles, itineraries and prices, and enquiry form. |
| Environmental Adventure Company: Itineraries and guide profiles for wildlife and cultural travel experiences in North and South America. |
| Envirotours.com: Environmental and educational tourism opportunities primarily in Africa, South American and Canada. |
| Exotic Worldwide Adventures: Ecotours in Venezuela and the Western United States. |
| Fischer Outdoor Discoveries: Offers wildlife tours of Yellowstone and Glacier National Parks, Alaska, and Botswana, with news and testimonials. |
| Footloose Forays: Selection of small group educational trips into the natural world, from day trips to three week adventures. |
| Global Research on Wildlife: Offers hands-on research and conservation experience and training with expert biologists. |
| Green Travel Network: Yahoo groups forum with focus on sustainable tourism. |
| Greentours Natural History Holidays: UK based company offers worldwide natural history tours. |
| Hosking Tours: Details and itineraries for photographic tours and safaris to a range of destinations. |
| International Wildlife Adventures: Offering trips around the world to observe and photograph wildlife including polar bears. Led by professional photographers and naturalists. |
| Journeys International, Inc.: With more than 300 eco-trips to 45 worldwide destinations for nature and culture explorations. |
| Kalahari Management Inc.: Information and consultancy for the ecotourism industry. |
| La Hesperia: Volunteer working programs at La Hesperia biological station and cloudforest reserve in central Ecuador. Includes requirements and conditions, rates, FAQ, and program details. |
| Lindblad Expeditions: Provider of small ship cruises presents itineraries, schedules, prices, and daily expedition reports. |
| Manaca Ecotravel: Offers worldwide tours. Includes destination details with ecological assessment ratings. |
| Moloney Hand-Built Trips: Personally guided wildlife expedtions worlwide. |
| Naturetrek: Selection of international tours, treks and cruises guided by British naturalists. |
| New Jersey Audubon Society: Information on North American and International Eco-tours focused on birds and other wildlife. |
| One World Journeys: Offering expeditions dedicated to connecting people with the planet. Includes schedules, past journeys, and environmental articles. |
| Organic Tours: Tours and travel consulting for people desiring healthy, organic meals while traveling to natural and sustainably designed and managed locations. |
| Planeta.com: Virtual library archiving more than 8,000 pages about ecotourism and conservation. Includes contacts and bibliographies. |
| Reef and Rainforest: Offers educational family adventure holidays worldwide. |
| ResponsibleTravel: Ethical travel resource providing information about the environmental impact of tourism, respect for local cultures and laws, photography, and banned souvenirs. |
| Sustainable Travel International: Non-profit organization that supports and promotes ecotourism, through education and outreach. Includes employment opportunities and programs. |
| The Original Canopy Tour: Offers information for canopy tour companies in seven international locations. Includes photos and booking information. |
| Tours of Exploration: Offers soft adventure, birdwatching, wildlife viewing, natural history, culture, and ecotourism programs worldwide |
| Travelroots: Presents destination information for responsible, ecologically sustainable holidays worldwide with useful links and tips. |
| Voyage of the Wanderbird: Operates long distance sailing cruises that provide informal education and interactive wildlife research projects. |
| Wildspace Expeditions: Personalised Indian and African wildlife tours catering to small private groups. |
| WildWatch Tours: Offer escorted wildlife and photographic tours. Includes destination information, guide profile, and enquiry form. |
| World Primate Safaris: Presents destination and accommodation options, suggested itineraries, terms and conditions, and contact details. |
| Worlds Together Travel Network: Immersion travel and cultural opportunities in Jamaica, Dominica Republic, Belize, and Egypt. Includes destination information and trip reports. |
Classical
