Cardinals in Hawaii: Meet the 3 Species That Call the Islands Home
October 28, 2026
Spot a flash of brilliant red darting through a Waikiki garden or along a Kauai hiking trail, and it’s easy to assume you’ve found a classic backyard bird from the mainland. In truth, cardinals in Hawaii tell a stranger story than most visitors realize. None of the three “cardinal” species now living across the islands are native, and two of them aren’t even true cardinals at all.
Northern Cardinals, Red-crested Cardinals, and Yellow-billed Cardinals were all brought to Hawaii by people, decades apart, for entirely different reasons. Each one settled in, spread across the archipelago, and became a fixture of everyday birdwatching. Here’s how to tell them apart, where each species came from, and where you’re most likely to see one on your next trip.
1. Northern Cardinal
The Northern Cardinal (Cardinalis cardinalis) is the bird most Americans already picture in their heads, and its journey to Hawaii started almost by accident. The first introduction of Northern Cardinal to Hawaii took place in 1929, when one of a pair escaped from a cage in Honolulu and its mate was subsequently liberated. That escape sparked a wave of intentional releases that followed soon after.
Over the course of the next two years, 300-500 birds were brought over from California and released on Kauai, O’ahu, and Hawai’i. A separate release added even more birds to the population: on Hawai’i Island, Northern Cardinals were reportedly established by 1933, after 163 individuals were introduced to Hilo during the “Buy-a-Bird Campaign” in 1929-1930. The combined effort worked better than anyone expected, and northern cardinals are now common throughout the state of Hawaiʻi.
Identification is straightforward once you know what to look for. They are nine inches in length with a distinctive head crest, and males are red with a black patch around a red bill. Females are brown, but otherwise the same. If you’re used to spotting cardinals back home, this is the version that will look most familiar, since it’s descended from the same species found across much of the continental United States.
On the islands, Northern cardinals live in or near dense underbrush or forests, and feed on insects, fruits and seeds. Researchers tracking the species over the decades found they are found throughout disturbed lowland forests and gardens, and less commonly in native forests, being most common in dry, open, lowland forests with grassy or shrubby understories. Their diet overlaps with many other backyard species, and gardeners curious about what draws birds to a yard can check a broader breakdown of what birds eat to survive.
Pro Tip: Male Northern Cardinals are among the most vocal birds on the islands at dawn. Listen for a clear, whistled song before you even start scanning the trees for that red silhouette.
Not every trend has pointed upward. Some Northern Cardinal populations in Hawaii are thought to have decreased somewhat over the last few decades, although they still live and breed as a healthy, self-sustaining population. Hawaii isn’t the only unlikely home this species has found either — the same bird was also introduced to Bermuda, where the species was introduced in 1700. If you’re planning a garden that keeps backyard birds safe and well fed, it’s also worth reviewing plants that are poisonous to birds before adding new landscaping.
2. Red-crested Cardinal
The Red-crested Cardinal (Paroaria coronata) looks nothing like its Northern cousin, and for good reason: it isn’t actually related to it. The Red-crested Cardinal is a different species from the familiar Northern Cardinal and actually sits in a completely different family, the tanagers. Despite its name, this bird — also commonly known as the Brazilian Cardinal — is not closely related to the true Cardinal family, Cardinalidae.
Its appearance is unmistakable once you’ve seen it once. The Red-crested Cardinal is a striking songbird, with its dazzling red head set off by a gleaming white collar, gray upperparts, and a white belly, and it uses its heavy, conical bill to feed on seeds, fruits, and insects. Native to South America and introduced to Hawaii, this member of the tanager family inhabits open areas with scattered trees and shrubs, including woodlands, parks, and gardens.
The timeline of its arrival lines up closely with the Northern Cardinal’s. Individuals from Brazil were introduced to Hawaii around 1930, and the species is now widespread in that state. Hawaii wasn’t its only stop, either: it has also been introduced to other areas such as Puerto Rico, Florida and Japan. On Kauai specifically, one of Hawaiʻi’s most beautiful birds is another species of cardinal called the red-crested or Brazilian cardinal, brought over from South America in the 1930s and now a common sight on the island.
Young birds look noticeably different from adults, which trips up plenty of new birdwatchers. Adults have gray feathers above and white below with a striking red head crest and white bill, while juveniles have a dark head and dark bill. If you enjoy tracking down other unusually colored species, the same curiosity applies well to purple birds found across North America.
Conservation status is a bright spot for this bird. The red-crested cardinal is listed as least concern by the IUCN thanks to its large population and range. That said, one threat is its illegal trade as a cage bird — a reminder that even common, thriving species can face pressure from the pet trade. Anyone drawn to the idea of keeping a colorful bird at home is better off researching low-maintenance pet birds raised through legitimate breeders rather than wild-caught stock.
Because all three Hawaiian cardinals get confused for one another, a side-by-side comparison helps:
| Species | Family | Introduced to Hawaii | Signature Feature |
|---|---|---|---|
| Northern Cardinal | Cardinalidae (true cardinals) | 1929 | All-red male with a black face mask |
| Red-crested Cardinal | Thraupidae (tanagers) | Around 1930 | Gray body, red crest, white collar |
| Yellow-billed Cardinal | Thraupidae (tanagers) | 1960s-1970s | Red head, bright yellow bill, no crest |
Cardinals aren’t the only introduced birds that have reshaped what a walk through a Hawaiian park looks like. For a fuller picture of the islands’ avian mix, including species that stand in stark contrast to these thriving imports, see this guide to endangered animals in Hawaii and this rundown of white birds in Hawaii.
3. Yellow-billed Cardinal
The least familiar of the three is the Yellow-billed Cardinal (Paroaria capitata), and it’s also the newest arrival. These birds were introduced in the 1960s but can now be seen across Hawaiʻi in parking lots, short grassy fields, and shrubby areas.
Important Note: Sources differ slightly on the exact decade this species arrived. Hawaii’s official birding trail guide points to the 1960s, while other regional bird profiles cite the 1970s along the Kona coast. Either way, it’s the most recently established of Hawaii’s three cardinal species.
Physically, it shares the Red-crested Cardinal’s red-and-gray color scheme but drops the crest entirely. Native to South America, the yellow-billed cardinal is easily seen with its bright red head and namesake yellow beak, black upperparts, a partial white collar that nearly meets at the back of the neck, white underparts, black chin and throat, and brown-pink legs and feet. Females are more gray with a brown head.
One straightforward identification shortcut comes from a Hawaii bird-spotting guide: the Red-crested Cardinal is gray with a striking red head and crest, while the Yellow-billed Cardinal looks similar but can be identified by its prominent yellow bill.
Size is another clue. This bird runs noticeably smaller than its cousins, measuring about 6 inches, or 15 centimeters, long.
Habitat preferences also set it apart from the other two species:
- It favors waterside habitats such as forested marshes, flooded fields, riparian scrub and forest, and wooded lakeshores.
- It’s relatively tolerant of human disturbance and can be found in waterside towns and cities.
- On the Big Island, it was introduced along the Kona coast, where it remains concentrated today.
- It forages on the ground in pairs or small flocks, often alongside other introduced songbirds.
Like the Red-crested Cardinal, this species is a tanager rather than a true cardinal. It was formerly placed in the Emberizidae family and isn’t very closely related to the cardinals proper, Cardinalidae. The confusion is understandable, since there’s a common misconception that Hawaii’s cardinals simply look different from mainland cardinals, when in fact they’re completely different species.
If you’re planning a trip specifically to see all three, a few locations consistently deliver. Ho’omaluhia Botanical Garden and Moanalua Gardens on Oahu, Koke’e State Park and Kilauea Point National Wildlife Refuge on Kauai, and Liliuokalani Gardens in Hilo are considered among the best places to see cardinals in Hawaii.
Beyond birds, the same wetland and garden habitats that draw Yellow-billed Cardinals also support other introduced wildlife worth knowing about, including the various types of lizards in Hawaii and the islands’ surprisingly diverse butterfly species.
Spotting the Difference in the Field
Once the three species are side by side, telling them apart gets much easier. Only the Northern Cardinal is solid red with a crest; the other two are gray-bodied birds with red heads, and the presence or absence of a crest is the fastest way to separate the Red-crested from the Yellow-billed. Bill color settles any remaining doubt, since only the Yellow-billed Cardinal carries that bright yellow bill its name promises.
For visitors used to spotting other brightly colored species back home, the habit of scanning for color patterns transfers well here — the same instincts that help identify blue birds elsewhere in the country work just as well on Hawaii’s red-headed imports. Whether you’re chasing your first sighting on a Kauai trail or checking a feeder in a Honolulu backyard, cardinals in Hawaii reward a little patience and a decent pair of binoculars.
None of them belong here in the strictest ecological sense, but all three have become as much a part of the islands’ everyday soundtrack as the trade winds themselves.