A living guide to Kauaʻi
Mammals of Kauaʻi
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.
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Black rat / ship rat
Rattus rattus
Kauaʻi status: Confirmed on Kauaʻi. Ecological relationships include forest birds, plant recruitment, and invasive-predator control.
Columbian black-tailed deer
Odocoileus hemionus columbianus
Kauaʻi status: Confirmed on Kauaʻi. Ecological relationships include vegetation condition, game management, and road-conflict monitoring.
Domestic and feral cat
Felis catus
Kauaʻi status: Confirmed on Kauaʻi. Ecological relationships include seabirds, ground-nesting fauna, marine-mammal disease risk, and responsible pet care.
Domestic and feral dog
Canis lupus familiaris
Kauaʻi status: Confirmed on Kauaʻi. Ecological relationships include sensitive wildlife sites and responsible pet management.
False killer whale
Pseudorca crassidens
Kauaʻi status: Confirmed in offshore waters surrounding Kauaʻi and Niʻihau. Ecological relationships include offshore food webs, fisheries, contaminants, and marine monitoring.
Feral goat
Capra hircus
Kauaʻi status: Confirmed on Kauaʻi. Ecological relationships include cliff vegetation, erosion, rare plants, and protected recovery areas.
Feral pig
Sus scrofa
Kauaʻi status: Confirmed on Kauaʻi. Ecological relationships include native forest, soils, streams, invasive plants, and watershed protection work.
Hawaiian monk seal
Neomonachus schauinslandi
Kauaʻi status: Confirmed on Kauaʻi shores and surrounding waters. Ecological relationships include beaches, reefs, fisheries, marine debris, and land-to-sea disease pathways.
House mouse
Mus musculus
Kauaʻi status: Confirmed on Kauaʻi. Ecological relationships include seed banks, invertebrates, and sensitive nesting sites.
Humpback whale
Megaptera novaeangliae
Kauaʻi status: Confirmed seasonally in Kauaʻi waters. Ecological relationships include sanctuary waters, vessel activity, ocean noise, and entanglement response.
Norway rat
Rattus norvegicus
Kauaʻi status: Confirmed on Kauaʻi; local distribution needs review. Ecological relationships include wetlands, ports, nesting fauna, and sanitation actions.
Hawaiian hoary bat
Lasiurus semotus
Kauaʻi status: Confirmed on Kauaʻi. Ecological relationships include insect prey, vegetation structure, collision hazards, and monitoring evidence.
Pacific rat
Rattus exulans
Kauaʻi status: Confirmed on Kauaʻi. Ecological relationships include native bird nesting, invertebrates, and plant recruitment.
Small Indian mongoose
Urva auropunctata
Kauaʻi status: No known established population on Kauaʻi. Ecological relationships include biosecurity, rapid response, and vulnerable ground-nesting species.
Spinner dolphin
Stenella longirostris
Kauaʻi status: Confirmed resident Kauaʻi/Niʻihau stock. Ecological relationships include resting bays, offshore prey, vessel use, and responsible wildlife viewing.
