South Kona, Hawaii
High on the western slopes of Mauna Loa, where the warm ocean air of South Kona climbs into cool mountain mist, the canopy of the native cloud forest comes alive with subtle motion. Among the towering trunks of ancient trees and giant tree ferns, a flash of brilliant reddish-orange cuts through the filtered sunlight. It moves in rapid, sweeping arcs before settling quietly onto the velvet-green leaf of an understory shrub.
This striking creature is the Kamehameha butterfly (Vanessa tameamea), known in the Hawaiian language as the Pulelehua. Named in honor of King Kamehameha I, who united the Hawaiian Islands, this majestic insect is one of only two butterfly species truly native to the Hawaiian archipelago.
For decades, however, sightings of the Pulelehua grew increasingly rare across the islands. As invasive weeds choked out native host plants, feral ungulates destroyed delicate forest understories, and introduced predators multiplied, this royal butterfly quietly vanished from much of its historic range.
At Ho‘omau Ranch, our private forest sanctuary and working land in South Kona have become the backdrop for a quiet ecological revival. Through dedicated habitat protection, ungulate exclusion fencing, and the large-scale propagation of key native host plants, we are witnessing a remarkable turnaround. The Kamehameha butterfly is making a triumphant comeback in our forest—offering a powerful testament to what happens when we restore the natural balance of island ecosystems.
To understand why the Kamehameha butterfly holds such a revered place in Hawaiian natural history, one must look closely at its biology and evolutionary story.
In 2009, following a petition started by local school children and supported by entomologists across the state, the Hawaii State Legislature officially designated the Kamehameha butterfly as Hawaii’s state insect. Yet long before modern legislation recognized its status, Native Hawaiians revered the butterfly as a natural treasure of the native forest (ngahere or nahele).
The adult Kamehameha butterfly is a master of visual deception, showcasing two dramatically different color schemes depending on whether its wings are open or closed:
The ancestors of the Kamehameha butterfly are believed to have arrived in Hawaii millions of years ago, likely blown across thousands of miles of open ocean by powerful storm winds from North America or Asia. Isolated in Hawaii's tropical mountain forests, these pioneer butterflies adapted exclusively to life among native island flora.
Over millennia, the species lost its instinct for long-distance oceanic migration, becoming fully dependent on the specific microclimates and native plants found within Hawaii's high-elevation cloud forests.
In the natural world, every butterfly species relies on specific host plants to complete its life cycle. While adult butterflies can sip nectar from a variety of flowering plants, their delicate caterpillars (koʻe) are strict dietary specialists. They can only eat and digest the leaves of specific plant species.
For the Kamehameha butterfly, one native plant reigns supreme: Māmaki (Pipturus albidus).
Māmaki is a native, non-stinging member of the nettle family (Urticaceae) that thrives in the moist, shaded understory of native Hawaiian forests. While Māmaki is widely celebrated today for its soothing, health-promoting herbal tea, its primary biological role in the cloud forest is serving as the indispensable nursery for the Pulelehua.
Female butterflies search the forest understory with acute chemical sensors in their feet, tapping Māmaki leaves to confirm their identity before laying tiny, pale-green eggs one by one on the leaf surfaces.
Once the caterpillar hatches, it exhibits a fascinating survival behavior: it uses silk threads to cut and fold a small flap of the Māmaki leaf over itself, creating a secure "leaf tent" or shelter. The young caterpillar rests safely inside this flap during the day to avoid hungry forest birds, emerging under the cover of night to feed on the surrounding leaf tissue.
Without healthy, abundant stands of Māmaki (Pipturus albidus), the Kamehameha butterfly simply cannot reproduce. The health of the butterfly population serves as a direct biological indicator of the health and abundance of Māmaki in the forest understory.
To understand how to save a species, one must first identify the cascading factors that drove its decline. The historical drop in Kamehameha butterfly numbers across the Hawaiian Islands was caused by a combination of habitat destruction and the introduction of aggressive alien species.
When wild pigs, goats, deer, and roaming cattle entered native forest reserves, they targeted the soft, tender vegetation of the forest floor. Māmaki shrubs, with their lush leaves and shallow root systems, were among the first native plants to be completely stripped and trampled.
As wild ungulates cleared acres of native understory, vast stretches of cloud forest lost their Māmaki layer entirely, leaving adult butterflies with nowhere to lay their eggs.
With the native understory cleared and soil disturbed by hooves, aggressive non-native weeds—such as strawberry guava, Christmas berry, and invasive pasture grasses—rapidly invaded the forest floor. These fast-growing alien plants choked out young Māmaki seedlings, blocking the sunlight and preventing natural forest regeneration.
Even when caterpillars managed to hatch on surviving Māmaki plants, they faced an onslaught of alien predators that native insects never evolved to withstand:
Faced with degraded habitat, missing host plants, and persistent predation, populations of the Pulelehua (Kamehameha Butterfly) crashed statewide, disappearing entirely from lower elevation areas and urban centers.
Saving a native species requires more than goodwill—it demands an active, science-based, century-scale restoration blueprint. At Ho‘omau Ranch, we recognized that bringing back the Kamehameha butterfly meant rebuilding the exact ecological conditions the species needed to thrive.
Our habitat recovery strategy rests on three interconnected pillars: ungulate exclusion, active Māmaki propagation, and long-term cloud forest corridor management.
The foundation of all native forest recovery on Mauna Loa is absolute protection from feral animals. By constructing heavy-duty, zero-tolerance ungulate exclusion fencing around designated conservation zones, we create safe havens where wild pigs, goats, and cattle cannot enter.
Once ungulates are removed from a fenced sector, the transformation is immediate and dramatic. Soil compaction eases, natural moisture levels recover, and dormant native seeds resting within the soil begin to sprout naturally without the threat of being eaten.
While natural seed regeneration occurs within fenced corridors, accelerating the butterfly's recovery requires active planting. In our on-site nursery, our team collects seeds from wild Māmaki mother plants across the property, germinating thousands of healthy saplings every year.
During our out-planting cycles, Māmaki saplings are strategically planted beneath the filtered shade of mature Koa and ʻŌhiʻa lehua trees. By planting Māmaki in dense clusters along natural water drainage gullies and shaded forest slopes, we recreate the rich understory thickets where female butterflies naturally seek to lay eggs.
Māmaki cannot thrive in a vacuum; it requires a healthy overstory canopy to protect its leaves from harsh, direct sunlight and drying mountain winds.
Our restoration model integrates Māmaki planting into a broader multi-tiered framework designed for long-term ecosystem stability:
By establishing diverse, multi-tiered native vegetation, we ensure our forest provides clean air, rich soil, and permanent habitat security for the next century and beyond.
The results of this dedicated restoration effort speak for themselves. Today, walking through the protected sectors of our native Kona forest sanctuary reveals a ecosystem coming back into balance.
Where Māmaki thickets have taken root inside our fenced conservation zones, the Kamehameha butterfly has returned in noticeable numbers. Naturalists, researchers, and tour guests walking along our shaded forest trails frequently spot female butterflies fluttering slowly among the Māmaki leaves, carefully selecting sites to lay their eggs.
Look closely at the underside of a healthy Māmaki leaf on the ranch, and you are likely to spot small folded leaf tents held together with delicate silk threads—proof that a new generation of caterpillars is feeding safely out of sight of predators.
The return of the Pulelehua is about far more than a single beautiful insect. In ecology, butterflies serve as "canary in the coal mine" species. Because their caterpillars are so sensitive to environmental changes and host plant availability, a booming butterfly population indicates that the entire forest understory is recovering.
As Māmaki thickets expand and butterfly numbers rise, other native species benefit as well:
Restoring native forests and maintaining miles of high-elevation boundary fencing requires significant, continuous investment. Traditional conservation projects often depend entirely on short-term government grants or variable non-profit donations.
At Ho‘omau Ranch, we use a sustainable eco-tourism model where tourism directly funds real-world conservation.
When travelers book one of our guided forest tours—whether exploring mountain trails on a 4x4 UTV or taking a quiet, educational conservation hike—a portion of every ticket goes directly to the Ho‘omau Ranch Conservancy.
These funds directly purchase:
By choosing an adventure with a purpose, every guest who steps onto our ranch becomes an active partner in bringing the Kamehameha butterfly back to the forests of South Kona.
In an era when headlines about environmental loss can feel overwhelming, the comeback of the Kamehameha butterfly at Ho‘omau Ranch offers a message of genuine hope. It proves that extinction and degradation are not inevitable—that when land stewards remove destructive pressures, reseed native host plants, and commit to long-term care, Hawaii’s unique native wildlife can rebound with astonishing speed.
The story of the Pulelehua reminds us that every element of the forest matters, from the tallest ancient ʻŌhiʻa tree down to a single Māmaki leaf folded by a tiny caterpillar.
As we look forward to the next century, we remain dedicated to expanding our protected corridors, planting thousands more Māmaki saplings, and ensuring that the royal reddish-orange wings of the Kamehameha butterfly will dance through the misty skies of South Kona for generations to come.
Want to see our forest restoration efforts firsthand? Explore our range of guided UTV tours and conservation hikes to experience the wild beauty and living conservation of Ho‘omau Ranch.
