The Science of Sustainability

Producer's Notes: Chasing Beetles, Finding Darwin

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Today QUEST TV broadcasts its half-hour documentary "Chasing Beetles, Finding Darwin," which tells the story of California Academy of Sciences beetle expert David Kavanaugh's unusual prediction that a new species of beetle would be found in Northern California's Trinity Alps.

The film follows Kavanaugh and his collaborator, University of California-Berkeley doctoral candidate Sean Schoville, as they search for the beetle, then put possible candidates to the test by dissecting them under the microscope and doing genetic testing on them.

It's rare for a biologist to predict the discovery of a new species – even for someone like Kavanaugh, who has discovered 73 new species. For his prediction, he drew inspiration from Charles Darwin's own prediction, which the English naturalist and founder of modern evolutionary biology made in 1862.

When Darwin saw an orchid from Madagascar with a foot-long nectare, he predicted that a pollinator would be found with a tongue (called a proboscis) long enough to reach the nectar inside the orchid's very thin, elongated nectar "pouch." Darwin's prediction was based on his finding that all living beings are related to each other and that some of them evolve closely together. His prediction came true in 1903, when a moth was discovered in Madagascar with a long, thin proboscis, which it uncurls to reach the nectar in the orchid's nectare. In the process of feeding from the orchid, the moth serves as its pollinator. The moth was given the scientific name Xanthopan morganii praedicta, in honor of Darwin’s prediction.

"Chasing Beetles, Finding Darwin" is QUEST TV's contribution to the celebration of Darwin's 200th birthday and the 150th anniversary of the publication of his book "On the Origin of Species."

Watch Chasing Beetles, Finding Darwin online. You can also see additional photos for this story.


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Category: Biology, Television

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Gabriela Quirós

About the Author ()

Gabriela Quirós is a TV Producer for KQED Science & Environment. She started her journalism career in 1993 as a newspaper reporter in Costa Rica, where she grew up. She won two national reporting awards there for series on C-sections and organic agriculture, and developed a life-long interest in health reporting. She moved to the Bay Area in 1996 to study documentary filmmaking at the University of California-Berkeley, where she received master’s degrees in journalism and Latin American studies. She joined KQED as a TV producer when QUEST started in 2006 and has covered everything from Alzheimer’s to bee die-offs to dark energy. She has shared two regional Emmys, and four of her stories have been nominated for the award as well. Independent from her work on QUEST, she produced and directed the hour-long documentary Beautiful Sin for PBS, about the surprising story of how Costa Rica became the only country in the world to outlaw in-vitro fertilization.