Cattle Egret

Kauaʻi evidence

Bishop Museum island checklist (version 2, 2017) lists Kauaʻi status N: naturalized resident or reintroduced population. See original island table. A Hawaiʻi-level record is available, but the species needs a documented Kauaʻi observation before local ecological conclusions are drawn.

Occurrence evidence

bishop_island_checklist_2017

Names and classification

Scientific name

Bubulcus ibis

Common names

Cattle Egret

Family

Ardeidae

Order

Pelecaniformes

Record type

Species

Kauaʻi occurrence and status

Kauaʻi occurrence

Kauaʻi documented: naturalized resident or reintroduced population (2017 island checklist)

Origin

Introduced

Conservation status

Not assessed

Evidence date

2026-09-13

Evidence limits

Island occurrence supported by the 2017 checklist; abundance and current year presence are not established here

Habitat and ecology

Habitats

Wetlands · Ponds

Food and resource needs

Introduced for insect control but now functions as an aggressive chick predator in native waterbird systems.

Reproduction

Suitable nesting or roosting sites, seasonal food, and protection from disturbance and predators.

Shelter

Shelter and structure within wetlands, ponds.

Threats and conservation

Threats

Threat to native waterbirds as chick hunters · Listed under Hawaii injurious wildlife framework

Conservation actions

Include in predator-control and native-waterbird nesting-risk analyses · Separate from native auku'u predation

Monitoring

Document date, place, observer, habitat, behavior, and supporting media for any Kauaʻi observation.

Data gaps

Update island status with dated contemporary records · Specific Kauaʻi habitat and abundance need local evidence

Process and seasonal context

Seasonal timing

Introduced Resident Widespread

Seasonal description

Cattle Egret (Bubulcus ibis) 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.

Sources and further reading

• https://hawaiibirdingtrails.hawaii.gov/bird/cattle-egret/
• https://dlnr.hawaii.gov/wildlife/invasives/injurious-wildlife/
• https://hawaiibirdingtrails.hawaii.gov/birding_hotspot/kawai%CA%BBele-state-waterbird-sanctuary/
• https://dlnr.hawaii.gov/wildlife/birds/aeo/
• https://dlnr.hawaii.gov/wildlife/birds/alae-keokeo/
• https://hbs.bishopmuseum.org/birds/rlp-monograph/SEHIlist.htm

Explore field guides

• Kauaʻi Birds