Japanese Wrinkled Frog

Names and classification

Scientific name

Glandirana rugosa

Common names

Japanese Wrinkled Frog

Family

Ranidae

Order

Anura

Kauaʻi occurrence and status

Kauaʻi occurrence

Present

Origin

Introduced

Conservation status

Not assessed

Evidence limits

Occurrence is supported; local abundance and impact estimates remain less certain than presence.

Habitat and ecology

Habitats

Streams, ditches, wetlands and other freshwater margins.

Food and resource needs

Primarily aquatic/terrestrial invertebrates.

Reproduction

Freshwater breeding habitat for eggs and larvae.

Shelter

Moist soil, vegetation, litter, crevices, banks, or aquatic edge structure depending on species.

Threats and conservation

Threats

Potential predation/competition and food-web effects in invaded freshwater systems; Kauaʻi-specific impact magnitude remains incompletely quantified.

Conservation actions

Early detection, containment/control where feasible, prevent intentional release or transport, protect high-value native habitats, and monitor ecological effects.

Monitoring

Repeat island occurrence surveys, population trend monitoring, and impact studies using standardized methods.

Data gaps

Current population distribution, abundance, and Kauaʻi-specific ecological effect sizes remain incompletely quantified.

Process and seasonal context

Seasonal timing

Year-round with activity/reproduction influenced by rainfall and temperature

Seasonal description

Japanese Wrinkled Frog (Glandirana rugosa) is a documented established nonnative species on Kauaʻi.

Sources and further reading

• USGS NAS — Japanese Wrinkled Frog — Kauaʻi collection records
• USGS — Eleutherodactylus frog introductions to Hawaiʻi