Monarch Butterfly Life Cycle: Egg to Adult (Danaus plexippus) with Photos

From milkweed egg to striped caterpillar, jade chrysalis, and fluttering monarch, witness metamorphosis, migration, and our role in protecting Danaus plexippus across North America today.

On the underside of a milkweed leaf, the world begins small enough to miss unless you kneel and look closely. In this first photograph the newborn is still a whisper of life, a pale pinhead egg collapsed into a glistening scrap, the tiny caterpillar beside it like a gray comma punctuating the green. It has just eaten the soft shell that cradled it—its first meal, its first thrift. The leaf’s pale roads of veins radiate around the hatchling; within that simple map lies all the geography it needs.

By the second photograph appetite has taken its proper throne. These pilgrims wear a uniform of warning: bands of yellow, black, and white—stripes as bright as hazard tape, a heraldic banner advertising the bitterness borrowed from milkweed. Each bite draws down defensive latex; yet the caterpillars feed undeterred, pausing to snip the leaf’s veins to quiet the flow. Their black, threadlike “tentacles” nod as they travel, and their peppery pellets—frass—collect like midnight hail. Five times they will outgrow themselves, shrugging off skins to reveal wider, hungrier versions within. The room is strewn with green rib and ragged edges; the air has the gentle smell of cut stems. All the while, milkweed’s poisons, the cardenolides, pass into growing bodies and become their bodyguard.

At last a hush. A final meal, a purposeful wander. The caterpillar chooses a high eave of the world—a stem, a stick, the corner of your rearing tent—and hooks itself into a downward J. Within hours the skin splits like a soft zipper; the striped creature pours itself out of itself and seals into a smooth chrysalis.

Here, the caterpillar has attached itself to a silk pad from which it hangs. Underneath the skin, the caterpillar is transforming to the chrysalis. In these photographs the silk pad and chrysalis attachment from a previous transformation are in the foreground.
Macro of the Monarch butterfly chrysalis. The black stalk attached to the silk pad is call a cremaster.

The following photograph and video catch the moments into becoming: the jade lantern has become transparent, darkening, its gold studs glinting like constellation points, and through the thinning walls the folded wings show, orange smoldering under smoke. Inside, old tissues have dissolved into a living broth; imaginal discs—tiny blueprints carried since the egg—have flowered into legs, eyes, and flight. To call it “metamorphosis” is correct; to call it mystery is truer.

Watch on YouTube for a better experience. Please “like” and “subscribe”

When the case opens the butterfly backs into the bright. It clings while the crumpled wings fill and flatten, hemolymph pumping life into every cell. In the next image the adult drinks from a petunia trumpet, a jeweled ember with white-spotted hems. The monarch—Danaus plexippus—tests the wind with new, purposeful wings. Its scientific name nods to ancient stories: Danaus after the Greek mythic king of Argos, a father who fled with his fifty daughters across the sea; plexippus for Plexippus, a figure of the same old tales—his name carried forward into this wanderer of the sky. The English name “monarch” is said to honor both its regal size and domain, and, some say, the orange-and-black of William of Orange. Kings and myths gathered like cloak and scepter around a creature that weighs less than a paperclip.

No butterfly has entered human life more completely. Schoolchildren cradle jars of milkweed sprigs and tape handwritten labels to chrysalides lined like seed pearls along a classroom window. Taggers kneel in September light, add a tiny disc to a wing, and write down time and place so the journey south can be traced. In the mountains of Mexico, where oyamel firs hold winter like a secret, people fold the monarch’s return into the Days of the Dead, believing that souls ride home on those wafers of flame. Gardeners tuck swamp milkweed into narrow beds and call their yards “waystations.” Photographers, such as myself, record the stories that happen leaf by leaf.

In early July a Monarch caterpillar revels in milkweed flowers.

Yet our touch is not simple. Fields simplified by herbicides have shaved milkweed from fencerows; tidy mowing removes nectar from roadsides in the tender weeks of migration; captive rearing in vast numbers, though done with reverence, may carry unintended risks of disease and weakened orientation. The monarch asks us to enlarge our sense of home beyond the fence: to let patches of milkweed lift their pale crowns in rough corners; to choose late-blooming asters and goldenrod; to keep a few ditches shaggy until the travelers pass. Conservation, like metamorphosis, is work that happens inside ordinary days.

Watch the cycle again in my images—egg to appetite, appetite to stillness, stillness to wing—and hear what it whispers in the steady voice of milkweed leaves and soft fall air. Rachel Carson wrote that “those who contemplate the beauty of the earth find reserves of strength that will endure as long as life lasts.” Here beauty wears stripes and beads of gold, sips from garden petals, and threads a continent with its frail insistence. The monarch’s life is a ribbon we can follow with our eyes and, if we are willing, with our hands—gentle hands that leave room for milkweed to rise, for caterpillars to feed, for a chrysalis to darken and a window to fill, one bright morning, with wings.

On a personal note, this season was a success. Monarchs visited our milkweed patch several times allowing me to save/harvest nineteen eggs/caterpillars and raise them until release.

Selected references
Carson, Rachel. The Sense of Wonder. New York: Harper & Row, 1965. (Reissued: HarperCollins, 1998; Open Road Media e-book, 2011.) The quoted passage (“Those who contemplate the beauty of the earth…”) appears early in the book; the Open Road edition places it on p. 41.
Wikipedia contributors. “Monarch butterfly — Etymology and taxonomy.” (useful overview with primary citations).
Oberhauser, K. S., and M. J. Solensky, eds. The Monarch Butterfly: Biology and Conservation. Cornell University Press, 2004.

Enter your email to receive notification of future postings. I will not sell or share your email address.

Echoes of Flight: The Summer the Monarchs Did Not Come

Contemplate the quiet sorrow of a summer without monarchs. Click on the photo to read the full story and reflect on this profound sense of loss on my blog.

This past summer, an absence visited our garden—a loss more profound than the quieting of wind. It was the virtual silence of an empty sky where monarch butterflies should have danced. Each day, we waited, hoping to catch a glimpse of those delicate wings, vibrant with orange and black, fluttering above the milkweed. But the familiar sight never came.

Monarch butterflies, those ethereal creatures that once graced our summers, seemed to have forgotten us.

Macro of the Monarch butterfly chrysalis. The black stalk attached to the silk pad is call a cremaster.

The photograph of the monarch chrysalis, a delicate gem hanging on a thread of life, speaks to the fragility of nature itself. Each chrysalis is a promise—a quiet, patient promise of transformation and renewal. Yet this summer, those promises vanished, leaving us to wonder where the monarchs had gone, what changes in the world pulled them away from our home in the Finger Lakes.

Our first monarch butterfly of 2023 just after emergence from the chrysalis and after wing expansion. This female will hang for several hours while the wings dry.

Another image from a time not so long ago, yet now seeming distant, shows a monarch caterpillar nestled among the milkweed blossoms. This was a time when our garden was alive with their presence, each caterpillar a testament to the cycle of life that once thrived here. The sight of them devouring the leaves was a sign of hope, a prelude to the transformation that would soon unfold. Now, that vibrant energy has vanished, leaving behind a quiet that speaks of loss and absence.

We are left to reflect on this silence, on the empty milkweed leaves and the air where monarchs once flew. The memories of summers past, when the monarchs filled our garden with their grace, are bittersweet now. They remind us of a time when the connection between the earth and its creatures was still intact, when the balance of nature had not yet been so precariously tipped.

In their absence, the monarchs leave behind a message—a reminder that their delicate beauty is not guaranteed, that the balance we once took for granted can be lost. The summer without monarchs urges us to look inward, to consider what must change, what must be protected, so that future summers may once again be filled with the fluttering of wings and the promise of life renewed.

The garden absence this year is a call to action, a plea from the earth itself to remember the delicate threads that connect us all. May we answer that call, so that this summer of loss will not reach into the future, but will be a pause, a moment of reflection before the return of the monarchs, and with them, the return of hope.

Request to my North American readers: leave comments exploring your experiences of Monarch butterflies the summer of 2024

Here are links to more Monarch photographs and videos.

Flight

Monarch Caterpillar to Chrysalis

Monarch Emergence

Copyright 2024 Michael Stephen Wills All Rights Reserved