Exotic Worldwide Adventures
Ecotours in Venezuela and the Western United States.
http://www.exoticwadventures.com/

Ecotravel.com
On-line magazine with directory of operators, lodges, private guides, organizations, and ancillary travel services..
http://www.ecotravel.com/

Manaca Ecotravel
Offers worldwide tours. Includes destination details with ecological assessment ratings.
http://www.manaca.com/

Earth Routes
Provides worldwide destination and project information with links to travel advisories and home exchange opportunities.
http://www.earthroutes.net/

EcoVentures Nature Tours and Travel
Offering guided small group tours and customized tours for individual travelers.
http://www.ecoventures-travel.com/

Greentours Natural History Holidays
UK based company offers worldwide natural history tours.
http://www.greentours.co.uk/

International Wildlife Adventures
Offering trips around the world to observe and photograph wildlife including polar bears. Led by professional photographers and naturalists.
http://wildlifeadventures.com/

Kalahari Management Inc.
Information and consultancy for the ecotourism industry.
http://www.kalahari-online.com/

Footloose Forays
Selection of small group educational trips into the natural world, from day trips to three week adventures.
http://www.footlooseforays.com/

One World Journeys
Offering expeditions dedicated to connecting people with the planet. Includes schedules, past journeys, and environmental articles.
http://www.oneworldjourneys.com/

Cross Cultural Journeys
Offers travel opportunities for individuals and groups seeking personal and global awareness.
http://www.crossculturaljourneys.com/

Moloney Hand-Built Trips
Personally guided wildlife expedtions worlwide.
http://www.moloneytrips.com/

Ecovolunteer
Information for travellers volunteering to participate in environmental projects worldwide.
http://www.ecovolunteer.de/

WildWatch Tours
Offer escorted wildlife and photographic tours. Includes destination information, guide profile, and enquiry form.
http://www.wildwatchtours.co.uk/

DreamWeaver Travel Company
Presents itineraries, guidelines, and travel ethics for guided tours to West Africa and South America.
http://www.dreamweavertravel.net

Hosking Tours
Details and itineraries for photographic tours and safaris to a range of destinations.
http://www.hosking-tours.co.uk/

Naturetrek
Selection of international tours, treks and cruises guided by British naturalists.
http://www.naturetrek.co.uk/

Fischer Outdoor Discoveries
Offers wildlife tours of Yellowstone and Glacier National Parks, Alaska, and Botswana, with news and testimonials.
http://www.fischeroutdoor.com/

ResponsibleTravel
Ethical travel resource providing information about the environmental impact of tourism, respect for local cultures and laws, photography, and banned souvenirs.
http://www.responsible-travel.org/

Ecotourism at Conservation International
Presents listings of organisations and destinations worldwide.
http://www.ecotour.org/

Lindblad Expeditions
Provider of small ship cruises presents itineraries, schedules, prices, and daily expedition reports.
http://itins.expeditions.com/

Wildspace Expeditions
Personalised Indian and African wildlife tours catering to small private groups.
http://www.wildspace.biz/

Worlds Together Travel Network
Immersion travel and cultural opportunities in Jamaica, Dominica Republic, Belize, and Egypt. Includes destination information and trip reports.
http://worldstogethertravel.com/

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.
http://www.crookedtrails.com/

Basecamp Explorer
Showcases worldwide destinations and philosophy. Includes terms and conditions, and contact details.
http://www.basecampexplorer.co.uk/

New Jersey Audubon Society
Information on North American and International Eco-tours focused on birds and other wildlife.
http://www.njaudubon.org/Travel/

Tours of Exploration
Offers soft adventure, birdwatching, wildlife viewing, natural history, culture, and ecotourism programs worldwide
http://www.toursexplore.com/

Discovery Initiatives
London agency offers unique holidays, including walking the wilderness trail and wildlife conservation programs.
http://www.discoveryinitiatives.co.uk/

Ecotourism Activity Guide
Information on ecotourism with links to associated activities and organizations.
http://www.ecotourism-activityguide.com/

Sustainable Travel International
Non-profit organization that supports and promotes ecotourism, through education and outreach. Includes employment opportunities and programs.
http://www.sustainabletravelinternational.org/

World Primate Safaris
Presents destination and accommodation options, suggested itineraries, terms and conditions, and contact details.
http://www.worldprimatesafaris.com/

Green Travel Network
Yahoo groups forum with focus on sustainable tourism.
http://groups.yahoo.com/group/green-travel/

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.
http://www.dolphincharters.com/

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.
http://www.volunteersecuador.com/

Reef and Rainforest
Offers educational family adventure holidays worldwide.
http://www.familytours.co.uk/

Voyage of the Wanderbird
Operates long distance sailing cruises that provide informal education and interactive wildlife research projects.
http://www.wanderbirdcruises.com/

Environmental Adventure Company
Itineraries and guide profiles for wildlife and cultural travel experiences in North and South America.
http://www.eactours.com

Journeys International, Inc.
With more than 300 eco-trips to 45 worldwide destinations for nature and culture explorations.
http://www.journeys.travel/