Smithsonian Journeys Experts

Dennis Wille Sáenz

photo of Dennis Wille Sáenz

Dennis became enamored of wildlife as a youngster in his native Costa Rica. Living in Central America, it is not difficult to see how biology could become the favorite science for any nature enthusiast, as there are several thousand species in the region. He has a passion for bird sounds and has a collection of them — recently he worked on the creation of a DVD that mixes the piano with the sounds of the birds.

His experience and knowledge has taken him to lead groups in other countries in Central America, South America, Africa, New Zealand, South East Asia, Australia, Russia, Alaska, the Arctic, the Antarctic, and the Caribbean. When he is not lecturing, Dennis travels to remote areas in Central America explaining to young students how fragile the ecosystems are where they live. He also works on several projects to monitor endangered species in order to improve conservation efforts.

What Our Travelers Say

Dennis was so engaging both with children and adults. We learned so much and he inspired us to learn more and to pay more attention to our every day environment.

- Smithsonian Journeys Traveler

Dennis is charming, and passionate about his work. We learned so much.

- Smithsonian Journeys Traveler

Dennis shared his vast knowledge with all, answered all questions, and was enjoyable to be with.

- Smithsonian Journeys Traveler

Upcoming Tours

Costa Rica's Natural Treasures

12 days | Starting at: $3,881
Multiple Departures
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Exploring Costa Rica: A Family Journey

8-9 days | Starting at: $3,395
Dec 26, 2017 - Jan 2, 2018
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Chile’s Patagonian Frontier

15 days | Starting at: $6,897
Jan 15, 2018 - Jan 29, 2018

With an Optional Extension to Easter Island
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Patagonian Explorer

17 days | Starting at: $7,769
Feb 24, 2018 - Mar 12, 2018

Argentina and Chile by Land and Sea
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