Introduced rat & mouse predation / seed loss

Names and classification

Record type

threat

Kauaʻi occurrence and status

Recorded state

Active / widespread

Threats and conservation

Pressure source

Introduced rodents

Exposure pathway

Predation on eggs/chicks/invertebrates; seed and fruit consumption; competition

Consequences

Reduced breeding success and plant recruitment; altered food webs

Affected requirements

Reproduction, recruitment, seed survival, nesting success and food webs

Susceptibility

Ground- and tree-nesting birds, rare plants, native invertebrates and offshore-islet colonies

Reversibility

Locally reversible with sustained control or eradication; reinvasion risk depends on isolation/biosecurity

Early warning indicators

Tracking index; chew cards; camera detections; nest predation; seed loss

Conservation interventions

Implementation limits

Magnitude, exposure and trend are not assumed uniform across Kauaʻi; local evidence governs.

Sources and further reading

• https://dlnr.hawaii.gov/wildlife/files/2026/03/FINAL-2025-SWAP.pdf
• https://www.fws.gov/species/invasive-species/about-invasive-species
• https://dlnr.hawaii.gov/dofaw/kauai/learn/

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