A living guide to Kauaʻi

Kauaʻi species, habitats and conservation records

Explore the island’s native and introduced species, habitats, watersheds and conservation work. Each record connects its description, images and sources with the interactive Atlas.

Page 46 of 58

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  Willet

  Tringa semipalmata

  Willet (Tringa semipalmata) is recorded as a vagrant on Kauaʻi in the Bishop Museum's 2017 island checklist. This is a documented island occurrence, not a claim of an individual sighting in 2026.

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  Wilson’s Phalarope

  Phalaropus tricolor

  Wilson’s Phalarope (Phalaropus tricolor) is recorded as a vagrant on Kauaʻi in the Bishop Museum's 2017 island checklist. This is a documented island occurrence, not a claim of an individual sighting in 2026.

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  Wilson’s Snipe

  Gallinago delicata

  Wilson’s Snipe (Gallinago delicata) is recorded as a winter visitor on Kauaʻi in the Bishop Museum's 2017 island checklist. This is a documented island occurrence, not a claim of an individual sighting in 2026.

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  Wilson’s Storm-Petrel

  Oceanites oceanicus

  Wilson’s Storm-Petrel (Oceanites oceanicus) appears in the wider Hawaiian bird catalog, but the Bishop Museum's 2017 island checklist has no Kauaʻi occurrence code for it. An island-specific record is needed before claiming local presence.

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  Wood Sandpiper

  Tringa glareola

  Wood Sandpiper (Tringa glareola) is recorded as a vagrant on Kauaʻi in the Bishop Museum's 2017 island checklist. This is a documented island occurrence, not a claim of an individual sighting in 2026.

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  Yellow-billed Cardinal

  Paroaria capitata

  Yellow-billed Cardinal (Paroaria capitata) appears in the wider Hawaiian bird catalog, but the Bishop Museum's 2017 island checklist has no Kauaʻi occurrence code for it. An island-specific record is needed before claiming local presence.

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  Yellow-billed Cuckoo

  Coccyzus americanus

  Yellow-billed Cuckoo (Coccyzus americanus) appears in the wider Hawaiian bird catalog, but the Bishop Museum's 2017 island checklist has no Kauaʻi occurrence code for it. An island-specific record is needed before claiming local presence.

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  Yellow-faced Grassquit

  Tiaris olivaceus

  Yellow-faced Grassquit (Tiaris olivaceus) appears in the wider Hawaiian bird catalog, but the Bishop Museum's 2017 island checklist has no Kauaʻi occurrence code for it. An island-specific record is needed before claiming local presence.

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  Yellow-fronted Canary

  Crithagra mozambicus

  Yellow-fronted Canary (Crithagra mozambicus) appears in the wider Hawaiian bird catalog, but the Bishop Museum's 2017 island checklist has no Kauaʻi occurrence code for it. An island-specific record is needed before claiming local presence.

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  Zebra Dove

  Geopelia striata

  Zebra Dove (Geopelia striata) is recorded as a naturalized resident or reintroduced population on Kauaʻi in the Bishop Museum's 2017 island checklist. This is a documented island occurrence, not a claim of an individual sighting in 2026.

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  Udeuid

  Abebaia udoido

  Udeuid (Abebaia udoido) is a post-contact introduced tree documented on Kauaʻi through cultivation records. In Palau, udeuid is a culturally important endemic canopy tree and a characteristic mature-forest species whose durable wood and flo

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  Rosary Pea

  Abrus precatorius

  A twining liana or scandent shrub with long stems and pinnate leaves carrying numerous small oblong leaflets. Pea-shaped flowers grow in dense clusters along a thickened flowering axis. Short, slightly swollen oblique pods open to reveal us

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  Hairy Abutilon

  Abutilon grandifolium

  Hairy Abutilon (Abutilon grandifolium) is recorded as an established shrub on Kauaʻi. A spreading shrub generally one to three metres tall. Its large toothed leaves have a deep heart-shaped base and conspicuous hairs. Yellow flowers have fi

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  Hoary Abutilon

  Abutilon incanum

  Hoary Abutilon (Abutilon incanum) is recorded as an established shrub on Kauaʻi. A low, branched shrub or subshrub, usually about half a metre to one metre tall, with small gray-haired toothed leaves. Hawaiian flowers have five pale pink pe

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  Formosan koa / Taiwan acacia

  Acacia confusa

  Formosan koa / Taiwan acacia (Acacia confusa) is an introduced tree treated as naturalized on Kauaʻi by Bishop Museum’s 2025 checklist and the 2026 Smithsonian checklist. Current extent is unassessed. Native to Taiwan and the Philippines an

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  Silver wattle

  Acacia dealbata

  Silver wattle (Acacia dealbata) is an introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival. Native to southeastern Australia and Tasmania, where it grows i

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  Koa

  Acacia koa

  Koa (Acacia koa) is endemic to the Hawaiian Islands and recorded on Kauaʻi. Tree to 35 m tall whose mature foliage consists of narrow, often strongly curved phyllodes rather than conventional leaves; seedlings first bear feathery bipinnate

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  Dwarf koa

  Acacia koaia

  Dwarf koa (Acacia koaia) is endemic to the Hawaiian Islands and recorded on Kauaʻi. Small tree about 4.5–9 m tall with a canopy that may spread about 6 m.

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  Mangium

  Acacia mangium

  Mangium (Acacia mangium) is an introduced tree treated as naturalized on Kauaʻi by Bishop Museum’s 2025 checklist and the 2026 Smithsonian checklist. Current extent is unassessed. A nitrogen-fixing wet-tropical tree native from Maluku throu

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  Black wattle

  Acacia mearnsii

  Black wattle (Acacia mearnsii) is an introduced tree treated as naturalized on Kauaʻi by Bishop Museum’s 2025 checklist and the 2026 Smithsonian checklist. Current extent is unassessed.

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  Australian blackwood

  Acacia melanoxylon

  Australian blackwood (Acacia melanoxylon) is an introduced tree treated as naturalized on Kauaʻi by Bishop Museum’s 2025 checklist and the 2026 Smithsonian checklist. Current extent is unassessed. Native to eastern and southeastern Australi

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  Barbed-wire Cereus

  Acanthocereus tetragonus

  A branching cactus shrub with long, dark-green angular stems that arch or clamber. Spiny areoles occur along the ribs. Large night-opening flowers have a long, sparsely armed tube and white to greenish inner segments. Mature fruits are brig

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  Spiny seaweed

  Acanthophora spicifera

  Species identity and image source are documented. Additional ecological and conservation citations are recommended.

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  Kuluʻī

  Achyranthes divaricata

  Kuluʻī (Achyranthes divaricata) is recorded as an established shrub on Kauaʻi. A densely branched shrub about 0.3–2 metres tall, covered in closely pressed silvery hairs. Narrow to elliptic leaves occur in opposite pairs. Its terminal flowe

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  Paurotis palm

  Acoelorraphe wrightii

  Paurotis palm (Acoelorraphe wrightii) is an introduced tree documented on Kauaʻi through cultivation records.

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  Calappa palm

  Actinorhytis calapparia

  Calappa palm (Actinorhytis calapparia) is an introduced tree documented on Kauaʻi through cultivation records.

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  Giant baobab

  Adansonia grandidieri

  Giant baobab (Adansonia grandidieri) is an introduced tree documented on Kauaʻi through cultivation records.

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  Boab

  Adansonia gregorii

  Boab (Adansonia gregorii) is an introduced tree documented on Kauaʻi through cultivation records.

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  Red sandalwood

  Adenanthera pavonina

  Red sandalwood (Adenanthera pavonina) is an introduced tree treated as naturalized on Kauaʻi by Bishop Museum’s 2025 checklist and the 2026 Smithsonian checklist. Current extent is unassessed. Native from tropical Asia through Malesia to no

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  Manila palm

  Adonidia merrillii

  Manila palm (Adonidia merrillii) is an introduced tree documented on Kauaʻi through cultivation records.

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  Tindalo

  Afzelia rhomboidea

  Tindalo (Afzelia rhomboidea) is a post-contact introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival. Native from Sumatra through Borneo to the Philippines,

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  Kauri

  Agathis australis

  Kauri (Agathis australis) is a post-contact introduced tree documented on Kauaʻi through cultivation records.

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  Pacific kauri

  Agathis macrophylla

  Pacific kauri (Agathis macrophylla) is an introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival. Native to humid tropical lowland and lower-montane rain for

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  Crofton Weed

  Ageratina adenophora

  Species identity and image source are documented. Additional ecological and conservation citations are recommended.

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  Hāmākua pāmakani

  Ageratina riparia

  Hāmākua pāmakani (Ageratina riparia) is recorded as an established shrub on Kauaʻi. A low, spreading subshrub with a creeping underground stem system and sprawling shoots roughly half a metre to one metre long. Narrow to elliptic leaves hav

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  Mapuñao

  Aglaia mariannensis

  Mapuñao (Aglaia mariannensis) is a post-contact introduced tree documented on Kauaʻi through cultivation records.

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  Tree of Heaven

  Ailanthus altissima

  Ailanthus altissima is an introduced tree with a Kauaʻi report dated 2011 in Bishop Museum’s 2025 checklist appendix. The reviewed sources do not establish current island presence or naturalization. Its management-watch status remains unres

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  Cuaro palm

  Aiphanes lindeniana

  Cuaro palm (Aiphanes lindeniana) is a post-contact introduced tree documented on Kauaʻi through cultivation records.

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  Macaw palm

  Aiphanes minima

  Macaw palm (Aiphanes minima) is a post-contact introduced tree documented on Kauaʻi through cultivation records.

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  Chinese albizia

  Albizia chinensis

  Chinese albizia (Albizia chinensis) is an introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival. Native from southern China through the Indian subcontinent

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  Lebbeck Tree

  Albizia lebbeck

  Lebbeck Tree (Albizia lebbeck) is an introduced tree treated as naturalized on Kauaʻi by Bishop Museum’s 2025 checklist and the 2026 Smithsonian checklist. Current extent is unassessed. A nitrogen-fixing tree native from the Indian subconti

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  Indian albizia

  Albizia lebbeckoides

  Indian albizia (Albizia lebbeckoides) is a post-contact introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival. Native from mainland Southeast Asia through M

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  White siris

  Albizia procera

  White siris (Albizia procera) is a post-contact introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival. Native across tropical and subtropical Asia to Queens

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  Whiteflower albizia

  Albizia saponaria

  Whiteflower albizia (Albizia saponaria) is an introduced tree treated as naturalized on Kauaʻi by Bishop Museum’s 2025 checklist and the 2026 Smithsonian checklist. Current extent is unassessed. Primarily wet tropical; native from Vietnam t

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  Paperbark albizia

  Albizia tanganyicensis

  Paperbark albizia (Albizia tanganyicensis) is a post-contact introduced tree documented on Kauaʻi through cultivation records.

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  Māhoe

  Alectryon macrococcus

  Māhoe (Alectryon macrococcus) is endemic to the Hawaiian Islands and recorded on Kauaʻi. Tree usually 4–11 m tall with reddish-brown striate branches and yellow-brown woolly young twigs.

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  Candlenut

  Aleurites moluccanus

  Aleurites moluccanus is native from tropical and subtropical Asia into the western Pacific and was carried to Hawaiʻi by Polynesian voyagers. It is now a conspicuous naturalized and culturally significant tree in many moist valleys and stre

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  Timor allophylus

  Allophylus timoriensis

  Timor allophylus (Allophylus timoriensis) is a post-contact introduced tree documented on Kauaʻi through cultivation records. Timor allophylus is a widespread Indo-Pacific coastal and wet-forest shrub or small tree. Its leathery-to-papery t

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  Alluaudia comosa

  Alluaudia comosa

  Alluaudia comosa (Alluaudia comosa) is a post-contact introduced tree documented on Kauaʻi through cultivation records. This short, flat-crowned species is part of Madagascar's highly seasonal limestone spiny thicket. Its semi-succulent ste

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  Madagascan ocotillo

  Alluaudia procera

  Madagascan ocotillo (Alluaudia procera) is a post-contact introduced tree documented on Kauaʻi through cultivation records. Madagascan ocotillo is a structural dominant in parts of southern Madagascar's spiny forest, where its tall water-st

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  Red ash

  Alphitonia excelsa

  Red ash (Alphitonia excelsa) is a post-contact introduced tree documented on Kauaʻi through cultivation records. Red ash spans dry woodland, savanna, gallery forest and rainforest-edge settings and often functions as a fast-growing pioneer

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  Kauila

  Alphitonia ponderosa

  Kauila (Alphitonia ponderosa) is endemic to the Hawaiian Islands and recorded on Kauaʻi. Tree 4–25 m tall with whitish bark that becomes deeply corrugated in dry habitats.

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  Toi

  Alphitonia zizyphoides

  Toi (Alphitonia zizyphoides) is a post-contact introduced tree documented on Kauaʻi through cultivation records. Toi is a rapid pioneer and early-secondary tree that recruits strongly after disturbance and can persist for decades as forests

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  Indian Devil Tree

  Alstonia macrophylla

  Alstonia macrophylla is a South and Southeast Asian tree introduced through forestry or horticulture. Wind-dispersed seed and rapid growth give it potential to spread from plantings into disturbed and secondary forest. KISC’s do-not-plant l

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  Blackboard tree

  Alstonia scholaris

  Blackboard tree (Alstonia scholaris) is a post-contact introduced tree documented on Kauaʻi through cultivation records. Across its native range blackboard tree occupies several forest formations, including seasonally dry and wet tropical f

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  Maile

  Alyxia stellata

  A native twining or spreading shrub with white milky sap. Glossy, smooth-edged leaves occur in threes or opposite pairs and release fragrance when crushed. Small greenish-to-yellowish white flowers grow in leaf-axil clusters. The ovoid frui

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  Broomsedge

  Andropogon virginicus

  Species identity and image source are documented. Additional ecological and conservation citations are recommended.

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  Smooth-barked apple

  Angophora costata

  Smooth-barked apple (Angophora costata) is an introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival.

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  Cherimoya

  Annona cherimola

  Cherimoya (Annona cherimola) is an introduced tree documented on Kauaʻi through historical forestry planting records. The reviewed records do not establish present survival.

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  Pond apple

  Annona glabra

  Pond apple (Annona glabra) is an introduced tree documented on Kauaʻi in historical forestry planting records and a separate 2018 cultivation catalog. The reviewed records do not establish present survival or naturalization.