Expedition Team

Our team is the key to your incredible adventure


Explore in the company of top experts on a Galápagos and Peru adventure tour. Benefit from their knowledge—team specialties include marine and terrestrial biology, botany, geology, and more—and passion for the Galápagos to observe and understand more of all you’ll see. And explore Machu Picchu & the Land of the Inca with top guides. They are deeply knowledgeable about the history and culture of Peru. Above all, each is passionate about the wonders of the region and dedicated to helping you achieve the richest experience possible on your Galápagos expedition.


Meet the expedition team for this departure

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  • Alexandra Widman

    Naturalist
    Alexandra grew up on the southeast coast of the United States. She has a deep love for the ocean that stems from her childhood spent surfing, kayaking, diving and fishing on the Intracoastal Waterway. Alexandra has lived on San Cristóbal Island for the past 6 years, having fallen in love with Galápagos the moment she arrived as a fledgling marine ecologist. She holds a bachelor’s degree in marine biology and a master’s in environmental science and management from the University of California Santa Barbara.

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  • Anahí Concari

    Naturalist
    Anahí grew up in a small house by the beach in the Galápagos Islands. Along with her best friend, she used to wander during the days around mangrove trees, becoming a different animal every day. She used to camp on solitary beaches, snorkel with sharks, dive with her uncle, a local dive instructor, and sail around the islands with her free spirit neighbors, learning about nature with her own hands, eyes and ears.  

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  • Brent Stephenson

    Naturalist/Certified Photo Instructor
    Brent Stephenson was born in New Zealand and has been a birder since childhood, and in 2005 completed his Ph.D., studying the breeding biology of Australasian gannets in New Zealand.  In 2003, along with Sav Saville, co-owner of their bird-guiding business, he rediscovered the “extinct” New Zealand storm-petrel, a bird known previously from only three museum specimens collected during the 1800s.  With support from National Geographic, he led a team conducting further research on this enigmatic seabird.

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  • Christian Saa

    Undersea Specialist
    Christian was born on the island of Isabela in the Galápagos archipelago. He grew up on a farm and had a magical childhood devoid of cars, electricity, telephones—just pure nature and playful sea lions along the beach. At the age of seven, he moved with his family to Santa Cruz Island, the economic hub of the Galápagos Islands. His father began to work in tourism and took Christian around the islands during school vacations. It was during this time that Christian learned to love and understand the real value of this unique archipelago, and he decided to devote his life to its stewardship. A lifelong passion for nature and its creatures took root in his heart, and he eventually decided to become a naturalist, which he has now been doing for 18 years now.

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  • Dexter Sear

    Video Chronicler
    Dexter grew up in England where a love for exploring the countryside ignited a lifelong passion for discovering natural history and embarking on adventure. As a teenager, two trips to India sparked a fascination with insects and a desire to share a “hidden” macro world was born. He produced a popular insect website and authored a reader digest about cultural entomology.

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  • Fabian Bucheli

    Naturalist
    Fabian Bucheli studied at the German School in Quito, graduated from the University of California with a bachelor of science in administration, and earned a master’s degree in international management from Thunderbird School of Global Management in Arizona. He has studied in Germany, France, Belgium, and Austria and is fluent in German, French, English, and Spanish. He has always been in love with nature and conservation. Explaining abstract concepts became second nature as a teaching assistant in biodiversity and evolution (University of Nevada, Las Vegas) while working towards a PhD in environmental risk management.

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  • Ixora Berdonces

    Naturalist
    Ixora was born in the Galapagos Islands, back when the streets were made of sand and gravel. Void of TV and tablets, her childhood friends and pristine natural surroundings made for an inspiring upbringing. She was always drawn to the ocean and her local environment, with her first adventures taking place underwater, in mangrove estuaries, and perched in treetops. Not surprisingly, she was scuba diving before the age of 12 and led her first diving trips as a Dive Master in the Galapagos Marine Reserve when she was 18. 

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  • Jennifer Davidson

    National Geographic Photographer
    Jennifer Davidson is a photographer and educator specializing in documenting travel and culture. She has photographed across the globe, including extensively in Colombia, where she visited remote fishing villages, as well as in Ecuador, where she focused her lens on indigenous cultures in the highlands and Amazon regions. Jennifer’s work in South America and the Galápagos Islands has been published in National Geographic Traveler (UK), and she has logged over 35 expeditions to the Galápagos, having traveled there with National Geographic and Lindblad Expeditions since 2007.

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  • Lucas Bustamante

    Naturalist/Certified Photo Instructor
    Lucas Bustamante has been bitten by countless snakes, dived with whale sharks, lived with Amazonian indigenous tribes and chased by elephants. Since he was a child, he grew up around the Ecuadorian outdoors and later became a passionate biologist and a conservation photojournalist.

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  • Roberta Schiess

    Naturalist
    Born and raised in the Galápagos, Roberta Schiess Bahamonde’s grandparents were among the first permanent inhabitants of Santa Cruz Island, arriving from Switzerland in the 1940s. Her mother is also a naturalist guide in the Galápagos, so this is a profession she has been exposed to her whole life, and she often accompanied her mom as she guided visitors. 

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