Kauaʻi record · KCA-IA-00618
Oceanic Field Cricket
Teleogryllus oceanicus
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About Oceanic Field Cricket
Oceanic Field Cricket (Teleogryllus oceanicus) is a member of Gryllidae in the order Orthoptera. Its recorded origin status on Kauaʻi is introduced / ancient human-assisted colonist.
Oceanic Field Cricket (Teleogryllus oceanicus) is documented from Kauaʻi. True crickets develop through incomplete metamorphosis. Hawaiian endemic lineages can be highly localized and may use forest-floor, vegetation, or other specialized habitats. On Kauaʻi, observations are most useful when they record calling song, substrate, elevation, nymph/adult stage, sex, and voucher. Where island-specific host, prey, breeding-site, abundance, or seasonal information is not yet firmly documented, those details should remain tied to direct specimens and field observations rather than inferred from populations elsewhere.
Oceanic Field Cricket (Teleogryllus oceanicus) is widespread on Kauaʻi and is internationally important as a model of rapid evolution. Many Kauaʻi males evolved a flatwing form that cannot sing, reducing attack by the parasitoid fly Ormia ochracea.
Kauaʻi occurrence evidence: A 1992 Kapahi survey recorded Teleogryllus oceanicus, and modern genomic research is based on the wild Kauaʻi population where the flatwing mutation evolved.
The cited occurrence evidence does not by itself establish current abundance or population trend on Kauaʻi.
Life cycle
Egg; nymphal instars; adult; no pupa.
Habitat
Leaf litter, ground layer, shrubs, trees, caves, or other microhabitats depending on species.
Food and ecological role
Often omnivorous or plant/detritus feeding; species-specific diet requires evidence.
Reproduction
Females lay eggs in soil or plant substrate; males may produce species-specific songs.
Movement
Walking/jumping; wing condition and flight capacity vary.
Ecosystem role
Omnivore/herbivore/detritivore and prey component of terrestrial food webs.
Threats and impacts
Narrow endemic species may be sensitive to habitat loss, invasive predators, ants, and altered microclimate.
Monitoring
Record calling song, substrate, elevation, nymph/adult stage, sex, and voucher.
Names and classification
- Scientific name
- Teleogryllus oceanicus
- Common names
- Oceanic Field Cricket
- Family
- Gryllidae
- Order
- Orthoptera
- Record type
- species
Kauaʻi occurrence and status
- Kauaʻi occurrence
- Present
- Origin
- Introduced / ancient human-assisted colonist
- Conservation status
- Not assessed
Process and seasonal context
- Seasonal description
- Oceanic Field Cricket (Teleogryllus oceanicus) is a member of Gryllidae in the order Orthoptera. Its recorded origin status on Kauaʻi is introduced / ancient human-assisted colonist.