Category Archives: In the News


Yup. This happened because I recently had a chat about all things firefly with Alie Ward for her amazing Ologies podcast! Learn how these tiny insects illuminate the night, some dos and don’ts of watching fireflies, choosy females, nuptial gifts, California pink glowworms, light pollution threats, little-known fireflies of the Western USA, and how you can help the world stay aglow with these beloved bugs.

➠ So, take a listen via Stitcher, Apple Podcasts, Spotify or wherever you get your finest podcasts.

Then don’t forget to check out all the fabulous links on the Ologies website here!


Fire-beetles or Fire-flies? Let’s Start a Movement!

Last week I had a chance to chat with Nate Butkus, 10-year old host of The Show About Science. We decided to start a FireBeetle* movement, and I geeked out about the gory side.

Meanwhile, enjoy these visuals from KQED’s Deep Look!

*Unfortunately, the name “fire beetle” has already been snagged by an Australian beetle (Merimna atrata) whose larvae develop in freshly burnt wood.

Unraveling the Mystery of Firefly Synchrony

Watching a whole forestful of fireflies flashing together in unison is a truly mesmerizing experience. As I described in an earlier post, males of only a few firefly species are capable of this remarkable feat. Although we still don’t know why this behavior occurs, some researchers at the University of Colorado – Boulder recently developed cool tools to shed new light on how fireflies accomplish this collective behavior.

Using Go-Pro cameras to film Photinus carolinus in the Great Smoky Mountains National Park, Raphael Sarfati and Orit Peleg were later able to reconstruct the 3D flight paths of individual male fireflies. You can read about their study in this month’s Smithsonian Magazine, or check out their original paper in the Journal of the Royal Society Interface.

Their findings provide clues into how insects with relatively small brains can perform such seemingly complex synchronous behaviors. By demonstrating how fireflies kick off their synchrony, this research will inspire new advances in swarm robotics. In the future, their tracking methods could also be adapted for community science projects like Firefly Watch in the U.S. to help scientists monitor long-term trends in firefly populations.

Keeping the firefly magic alive

Photinus carolinus fireflies light up a trail in the Great Smoky Mountains. Photograph by Radim Schreiber /

So excited to announce that we just published the first-ever comprehensive review about the threats facing fireflies around the globe!

In this article we also describe several things we all can do to give fireflies a brighter future. You can read our article here (we’re tremendously grateful to BioScience for making this Editor’s Choice & freely available).

I’m also delighted to announce my upcoming 1-year sabbatic leave from teaching at Tufts University, starting in May 2020. I’m looking forward to spending more time working on several firefly conservation initiatives, including serving as co-chair for the IUCN Firefly Specialist Group and working with my colleagues at Fireflyers International.

In the meantime, you might enjoy this great article in The Guardian summarizing the work that we & many others have been doing to keep the firefly magic alive!

In the News

August 2019: Listen to two Sara(h)s on NPR Science Friday – Are Firefly Populations Blinking Out?

August 2019: Read this USA Today article about the battle between real estate developer & Delaware’s endangered Bethany Beach firefly

japanese version in bookstore

August 2018: Newly Published – the Japanese edition of Silent Sparks! ホタルの不思議な世界

August 2018: On Firefly Diversity (from NPR’s Stateside) – What About that 2018 Firefly Boom?

September 2017: Read our piece about China’s Vanishing Fireflies in Scientific American

June 2017: Hot news – Silent Sparks Wins 2017 Independent Publishers National Gold Medal for Science!

December 2016: Silent Sparks Lands on Top 10 List (among very distinguished company)! – Science News Favorite Books of 2016

July 2016: Listen and tremble (from NPR’s Weekend Edition) – The Dark Side to the Firefly’s Flare

July 2016: Fireflies are public health champions –   TED Ideas

July 2016: Four threats to firefly wonder – CNN

July 2016: When Japanese fireflies were loved nearly to death – Aeon Magazine

Night workers: How evolution drives the firefly dance – The Guardian

Reviews now rolling in:

“Prepare to be dazzled and amazed.” – Eric Eaton, author of Kaufman Field Guide to Insects of North America

“What makes Silent Sparks catch fire is Lewis’s breathtaking ability to channel her inner Rachel Carson and bring that ‘sense of wonder’ to the table as the author delves into all things Lampyridae.”-Bruce Fellman, Kent County Daily Times

Nature “a nocturnal wonder of nature…an illuminating peek into a fascinating corner of field biology.” – In “this absorbing book … a wealth of easily-assimilated, sometimes jaw-dropping information on the mysterious world of fireflies…gleams brightly from every page.”
Harvard Magazine – This “informed, enthusiastic guide to ‘the best-loved insects on Earth’ is reason enough to look forward to summer nights.”

Washington Post Lewis “tells… icky tales with glee” but then  presents “the radiantly appealing aspects of the firefly world… It’s all pretty amazing.”

Friends & Neighbors:

“Your book totally changed the way I look at our backyard fireflies.” Tyler D.

Silent Sparks just opened a new world for me…thank you for sharing your umwelt.” Kristy F.

I’ve been waiting for this book for so long! Fireflies are my favorite insects and I enjoy watching them and learning more about their fascinating lives. there have not been any good references to really explain what i’ve been seeing after dark so I’m glad to have this new information. I got two copies and will buy more for Christmas gifts.” Southern Movie Buff (on Amazon)

Early reviews:

“With stunning illustrations and accessible text … this book brings new awe to the flashing spectacle and love song of fireflies.” – Bernd Heinrich, author of Winter World,  Mind of the Raven, and Life Everlasting

“a beautifully written ode to fireflies and their behavior by someone who has made major research discoveries about these fascinating creatures … a book everyone can enjoy.”   – John Alcock, author of Animal Behavior: An Evolutionary Approach and When the Rains Come: A Naturalist’s Year in the Sonoran Desert

“rewarding on so many fronts… an enjoyable, informative tour into the lives of fireflies.” – Doug Emlen, author of Animal Weapons and Evolution: Making Sense of Life

Silent Sparks makes you want to drop whatever you’re doing and devote yourself to learning everything you can about the charismatic, even enlightening, firefly…whose dramatic lives are revealed with humor, insight, and passion.” – Marlene Zuk, author of Paleofantasy, Sex on Six Legs and Riddled with Life

“exudes the curiosity and sheer joy that comes from exploring and celebrating the science of life… this marvelous book reveals a world of wonder that will leave readers breathless with awe.” Wade Davis, National Geographic Explorer-in-Residence