About the Holiday
World Firefly Day was instituted by Fireflyers International Network to raise awareness of these summer night beauties and the dangers to their survival, including habitat destruction, pesticides, light pollution, and over-collection. More and more, as fields and marshlands are paved over for building and waterways open up to recreation, the fireflies that call these places home are disappearing. This year’s theme is “Let’s stay together in the challenging world” and encourages everyone to learn how to “live in harmony” with fireflies. To learn more about fireflies, how you can make your garden or lawn firefly friendly, and more, visit Firefly Conservation & Research.
Light the Sky, Firefly!
Written by Sheri Mabry Bestor | Illustrated by Jonny Lambert
When fireflies begin dotting the summer night sky with light, it may seem like they magically appear out of nowhere. But as Sheri Mabry Bestor eloquently reveals, these beautiful insects have been lurking and luminescing for a long time. How long? Well, as summer rains dampen the earth, a firefly lays her eggs (up to 500!) under brush or fallen leaves. “Under the leaves, the eggs lay still. For the baby fireflies inside the shells, it is time to grow. And begin to glow.”
The larvae hatch after a month, and then they begin to eat, eat, eat. Slugs and snails are on the menu, and a paragraph of scientific information about the firefly’s nighttime dining discloses that “instead of fighting their prey, the larvae bite and then inject the prey with a liquid that keeps it from moving to get away.” All through the rest of summer and fall, the baby firefly grows. During the winter, the larvae undergo many transformations, growing and outgrowing a series of casings.
It isn’t until late spring when the larvae are ready to become an adult. When they are ready, they emerge from their mud nest, and while the sun is high, they stay low to the ground. But “when the sun begins to set, they begin to climb higher. And when the sky turns black, fireflies launch!” Then “the sky is filled with flashing fireflies. They twinkle like faraway stars.”
The darkness of night doesn’t protect them from predators, though, so fireflies always have to be on the alert. If they are caught, fireflies have a bitter surprise for the hungry critter. And what about those blink, blinks that we all marvel at? Those signals aren’t random. As Sheri Mabry Bestor explains, “Fireflies blink with specific rhythms called ‘flash patterns,’ and each species has its own. This helps them communicate with each other.” Not only does that luminescent chemical help fireflies, Bestor describes ways in which scientists and doctors are studying it in hopes of helping people.
“In time, the females are ready to lay their eggs. Pitter-patter, drizzle-drip. Summer rain cools the earth. Bees buzz. Birds glide. A firefly finds a place under the leaves that blanket the ground.” The eggs hide under leaves, waiting until next summer when it’s their turn to shine.
Sheri Mabry Bestor’s lovely, poetic story of the lifecycle of fireflies is a beautiful read aloud for summer nights or for whenever you and your kids are missing the simple pleasures of summer. While the story plays out from page to page in flowing and sometimes colorful text, scientific facts about these insects, their transformations, homes, anatomy, protection, and, of course, their bright and glowing communication skills are tucked in the corner waiting to be discovered and explored. Bestor’s rhythmical cadence also highlights the seasonal changes that accompany fireflies’ growth from tiny larvae to adult and the cyclical wonder of nature.
Jonny Lambert’s stunning textured collage-style illustrations portray all the beauty of these unique insects and the landscape they inhabit. Mottled greens and yellows give depth to lush leaves, opaline snail shells catch the light above as the curious snail discovers the glowing eggs below, and delicate spring flowers camouflage the mud nests where the larvae are transforming into adults. But the nighttime scenes are breathtaking with deep blue skies, a canvas for the pin pricks of light that create summer’s most spectacular show. Both realistic and dreamlike, these nighttime pages will have kids and adults scurrying outside to watch and be a part of it.
A gorgeous book to celebrate the exquisite charm of fireflies as well as to impart natural science facts, Light the Sky, Firefly is highly recommended for home, school, and public library bookshelves.
Ages 4 – 8
Sleeping Bear Press, 2022 | ISBN 978-1534111158
Discover more about Sheri Mabry Bestor and her books on her website.
You can connect with Jonny Lambert on Twitter.
World Firefly Day Activity
Firefly Flight Maze
This little firefly wants to join her friends in the forest. Can you help her through the maze to find them in this printable maze?
You can find Light the Sky, Firefly! at these booksellers
To support your local independent bookstore, order from
Picture Book Review