- Butterflies of Kerala - - Travel agency highlights tours and excursions to see the butterflies and variety of species in Kerala, India. Photos and description of itinerary available.
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- Diamantina Outback Tours - - Offers expeditions based on natural history to remote regions of Outback Australia. Details of tours, booking, information on the Outback.
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- Eclipse Tours - - Solar eclipse tours to the next total solar eclipse, also includes tour packages for the Leonid Meteor Showers.
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- Global Expeditions - - Expeditions to foster exploration, conservation, community and medical aid in remote areas, led by John Blashford-Snell of Scientific Exploration Society.
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- The Orchids of Cyprus - - Information about planning a self-guided trip to Cyprus to see the native orchids, and recommends a new book on the subject.
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- Raymond Wiggers, Guide and Educator - - Professor conducts geology and botany tours. Site has links to free geology and botany information, details about past and upcoming expeditions, and photo galleries.
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- Reef and Rainforest Tours - - ATOL-bonded tour operator features natural history itineraries, tailor-made and small group trips also available.
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- Sahara Overland - - Paleontological, geological, and off road field expeditions in Morocco. Order information on fossils available.
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- Volcano Live - - Provides information about volcanoes, eruption, and volcano treks, and links to other volcano educational sites. Includes links to volcano-cams.
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- Watershed Belize Field Course - - Describes watershed field course designed to experience travel through a tropical watershed in Belize; a journey from the Maya Mountains rainforest to the Barrier Reef.
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