A rare honeycreeper that lives in high-elevation Hawaiian forests and depends on native trees.

A keystone forest tree with bright red blossoms that provide nectar for native birds and insects.

A bright red honeycreeper that travels long distances in search of blooming ʻōhiʻa trees.

A tall Hawaiian tree important for soil stability, habitat, and traditional Hawaiian culture.

A small yellow honeycreeper found only on Kauai and Hawaii Island.

A striking scarlet honeycreeper with a curved beak adapted for feeding on native flowers.

A coastal tree with yellow flowers, important for coastal stabilization.

A native raspberry with edible berries, important for native forest ecosystems.

A small flycatcher that actively hunts insects in native forests.

A native fern that forms dense stands in Hawaiian forests.

Axis deer were introduced to Hawaiʻi and have rapidly increased in number, eating crops and native plants.

A small frog with a very loud call that came from Puerto Rico and spread in Hawaiʻi.

Cats that live outdoors hunt birds, lizards, and other wildlife, even when they are well-fed.

A fast-growing tree with red fruit that forms thick stands and crowds out native plants.

Introduced to control rats, but now preys on native birds, eggs, and insects.

A large tree with purple flowers that shades out native understory plants.

A shrub with pink flowers that forms dense thickets in native forests.

Ship rats that prey on native birds, eggs, and insects throughout Hawaiʻi.

A creeping plant with yellow flowers that forms dense mats on the ground.

A fast-growing vine that covers trees and other plants, blocking sunlight.

A coastal shrub with white flowers, important for dune stabilization.

Hawaii's state tree, with oily nuts used for traditional purposes.

A drought-tolerant tree with coral flowers, important for native ecosystems.

A coastal tree with aerial roots, important for coastal stabilization.

A nitrogen-fixing tree important for soil health in Hawaiian forests.

A fruit tree that forms dense thickets and spreads rapidly.

A fast-growing vine that smothers vegetation and structures.

A shrub with colorful flowers that forms dense thickets.

Wild pigs that root up native plants and spread invasive seeds.

An ornamental grass that spreads rapidly and increases fire risk.

Introduced goats that have gone feral, causing severe damage to native vegetation and soil.

Domestic sheep that have become feral and damage native ecosystems.

Common house mice that compete with native species and spread diseases.

Large rats that prey on native wildlife and damage crops.

One of the earliest invasive species brought by Polynesians, preys on native wildlife.

Rabbits that have established feral populations and damage vegetation.

Aggressive birds that compete with native species and damage crops.

Common birds that compete with native species for nesting sites.

Small birds that compete with native species and spread diseases.

Doves that have established populations and compete with native birds.

Small doves that are abundant in urban and suburban areas.

Common urban pigeons that compete with native species.

Large frogs that prey on native insects and compete with native frogs.

Lizards that prey on native insects and compete with native reptiles.

Agile lizards that prey on native insects and compete with native species.

Trees that form dense thickets and crowd out native vegetation.

Fast-growing trees that shade out native vegetation.

Shrubs with red berries that form dense thickets.

Thorny shrubs that form dense stands and increase fire risk.

Showy ginger plants that spread aggressively in forests.

Vines that smother native vegetation and trees.

Tall grasses that form dense stands and increase fire risk.

Painful stinging ants that disrupt native ecosystems.

Large beetles that damage coconut palms and other plants.

Fruit flies that damage agricultural crops and fruits.

A prickly poppy with white flowers, important for native ecosystems.

Hawaii's state flower, a coastal shrub with yellow flowers.

An introduced tree that forms dense stands in native forests.

A shrub with red berries that spreads in native forests.

One of the most endangered earless seals in the world, endemic to the Hawaiian Islands.

Hawaii's only native land mammal, a small bat that roosts in trees.

Large sea turtles commonly seen basking on Hawaiian beaches.

A raptor endemic to the Big Island, a symbol of royalty in Hawaiian culture.

A native owl that hunts during the day, often seen flying over grasslands.

A waterbird with a distinctive white frontal shield and bill.

A secretive waterbird with a red frontal shield.

A tall, slender shorebird with long pink legs.

A highly intelligent crow species, currently extinct in the wild but being reintroduced.

A large seabird that nests on the Northwestern Hawaiian Islands and Kauaʻi.

A large seabird known for its kleptoparasitism (stealing food from other birds).

A graceful white seabird with long tail streamers, often seen in valleys.

A seabird that nests in burrows at high elevations on Maui and other islands.

A shearwater that nests in deep fern forests.

A smaller, harder relative of the Koa tree, found in dry forests.

A striking plant related to the silversword, endemic to Kauaʻi.

A common coastal shrub with distinctive "half-flowers".

A silvery-green coastal shrub with purple flowers.

A large tree fern characteristic of Hawaiian rainforests.

A fern with reddish young fronds, often colonizing lava flows.

Hawaii's only native palm genus, with many species being endangered.

A native cotton shrub with yellow flowers.

A native lily with blue berries used for dye.

A hardy shrub with papery seed capsules used in lei.

Hawaii's state insect, a colorful butterfly endemic to the islands.

Hawaii's largest native insect, an endangered moth.

A tiny spider with patterns on its back that look like a smiling face.

A toxic yellow flower that plagues pastures.

A vine with claw-like tendrils that climbs and smothers trees.

A tall ginger with fragrant yellow-red flowers that displaces native plants.

A large, toxic toad introduced to control pests.

A three-horned chameleon native to East Africa.

Green parakeets that damage crops and are noisy.

A bird with a black crest and red vent, spreads invasive seeds.

A pheasant found in forests, spreading seeds.

White birds often seen with livestock, preying on insects and birds.

Introduced to control rats, but also kills native seabirds.

The last surviving member of the ʻōʻō family, declared extinct in 2000.

A large black bird with yellow tufts, hunted for its feathers.

A solitaire thrush native to Kauaʻi, extinct in the late 20th century.

A striking bird with yellow feathers, extinct since the mid-19th century.

A black honeycreeper with a very long, curved bill.