Associations
Aboriginal Tourism Team Canada (ATTC), Association of Small Scale Enterprises in Tourism , Ecotourism Australia, Ecotourism Society of Kenya, Ecotourism Society Pakistan (ESP), Friends of Nature - Nepal, Hawaii Ecotourism Association (HEA), National Wildlife Federation Expeditions, The Belize Ecotourism Association (BETA), The International Ecotourism Society
Birding
AABirding and Travel, Abberton Birdstay, African Treks, All India Birding, Alto Andino Nature Tours, American Birding Association Tours, Attour, Atypus Tours, Avian Research and Adventures, Bird I.D. Company
By Region
Asia, Europe, North America, Adventure Travel Society, AMI Travel - Ecotours, Circumpolar Expeditions, Desert Eco Tours, Ecoturismolatino, EcoVitality, Explorations Inc - Florida, Hosking Tours, Naturetrek, The Commander Islands
Dolphins, Manatees, and Whales
Dolphin Swimming, Manatees, Regional, Out of the Blue, Whale Guide
Away.com
Large on-line travel wholesaler and operator offering special interest holidays including ecotourism.
Earth Routes
Reservations, resources and personal experience in off-the-beaten-path nature-oriented travel.
Earthfoot's Ecotour Posterboard
Find a local guide for personalised eco-tour experiences.
Ecotourism Resource Centre
A comprehensive directory with worldwide links to sites about ecotourism practice, ecologically sustainable development (ESD) and general tourism and travel best practice management.
EcoVentures Nature Tours and Travel
Offering guided small group tours and customized tours for individual travelers.
Envirotours.com
Environmental and educational tourism opportunities primarily in Africa, South American and Canada.
Exotic Worldwide Adventures
Ecotours in Venezuela, Thailand and the USA
Footloose Forays
A selection of educational trips into the natural world, from day trips to three week adventures, near or far. Specializing in small groups.
Great Outdoor Recreation Pages
International guide to wildlife viewing.
Greentours Natural History Holidays
UK based company who offer worldwide natural history tours.
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.
One World Journeys
Offering in depth photography expeditions dedicated to connecting people with the planet. Includes schedules, past journeys, and environmental articles.
Planeta.com: Eco Travels in the Americas
Virtual library archiving more than 8,000 pages about ecotourism and conservation. Includes contacts and bibliographies.
Responsibletravel.com
Lists eco-friendly holidays for destinations around the world. Links to articles and travel tools included.
TravelOrganic
Lists organic businesses and services for travelers with organic lifestyles.