The Natural Path
- Offers guided birding and nature walks in New England.
- http://www.naturalpathwalks.com/

EcoTurismo Yucatan
- Based in Merida. Provides package and custom tours of the world of the Maya including archaeology, culture, birdwatching, kayak and bicycle tours. [English/Spanish]
- http://www.ecoyuc.com/

The Snow Goose
- Research and natural history cruises in Southeast Alaska, the Inside Passage, and the San Juan Islands.
- http://www.snowgoosealaska.com/

Insider
- Offers independent tours and in-depth information on Alaska's marine wildlife.
- http://www.insidepassagetours.com/

Nature Trek Canada
- Offer wilderness expeditions in Canada and Alaska.
- http://www.naturetrek.ca/

Real Mexico Adventure Tours
- Canadian tour company providing cultural tours in Mexico. Includes testimonials and photos.
- http://www.realmexicotours.com/

Rancho Komchen de los Pajaros
- Ecouturism ranch in Yucatan ideal to birdwatch, horse-trail and bicycling. Located near the beach and close to Merida, between the most important mayan circuits.
- http://www.komchen.org/

Pine Stump Farms
- Hosts cultural exchanges, farm internships, and horseback tours on the Colville Indian Reservation in Okanogan County, Washington State.
- http://www.pinestumpfarms.com/

Alabama Eco Expeditions
- Presents staff biographies and schedules for one day and weekend educational camping trips.
- http://ourworld.cs.com/alecoexpeditions/myhomepage/business.html

DP Nature Tours
- Guided outdoor adventures in the Okefenokee and Suwannee River eco-system.
- http://dpnaturetours.com/

Outer Limits Alaska
- Offers air tours to view and photograph the Iditarod and Yukon Quest dog sled races.
- http://www.outerlimitsalaska.com/

AK Adventures
- Rates for tours to view Brown Bears in Alaska. Includes bear facts and behaviour.
- http://www.goseebears.com/

Bluewater Adventures
- Offers bear viewing, whale watching, bird watching, nature, and cultural cruises with naturalists in British Colombia and southeast Alaska.
- http://www.bluewateradventures.ca/

Maple Leaf Adventures
- Natural and cultural history sailboat cruises throughout Vancouver Island, coastal BC and to Alaska. Information on trips, schedules and amenities.
- http://www.mapleleafadventures.com/

Eco Colors
- Offers bird-watching, biking, archeological, diving, and hiking tours in the Mayan world of southeast Mexico.
- http://www.ecotravelmexico.com