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Christmas Island Goshawk (Accipiter hiogaster natalis)

The Christmas Island Goshawk is an endemic goshawk subspecies found only on Christmas Island, an Australian territory in the eastern Indian Ocean. Native rainforest with suitable tall trees is important for breeding.

Conservation status

Commonwealth, EPBC Act 1999: Endangered.

Seasonal planning

Breeding season runs from August to January.

Seasonal evidence: From published sources for this species.

Timing varies between sites and years.

  • Breeding season: Breeding season runs from August to January.

Identification: Appearance

Its call is described as slow, high-pitched and piercing, with a repeated “ki-ki-ki”.

Its call is described as slow, high-pitched and piercing, with a repeated “ki-ki-ki”.

Identification: Confirming identity

Confirm the identity of any suspected record with a specialist and a photograph or voucher, as required by the relevant permit.

Distribution: Known range

The goshawk is confined to Christmas Island, where it is widespread but uncommon.

The goshawk is confined to Christmas Island, where it is widespread but uncommon.

Distribution: National mapping

The Commonwealth species distribution model (SNES) maps where the species or its habitat is known, likely or may occur. Use it with local records and site inspection.

Habitat: Habitat

It occurs across the island’s forest types, from primary and marginal rainforest to secondary regrowth, and is also found around forest edges and clearings. Suitable tall trees in native rainforest are considered important for nesting.

It occurs across the island’s forest types, from primary and marginal rainforest to secondary regrowth, and is also found around forest edges and clearings. Suitable tall trees in native rainforest are considered important for nesting.

Foraging habitat: Diet

It is an opportunistic hunter. Recorded prey includes birds, insects, centipedes and rats, as well as seabird nestlings and adult bosun birds.

It is an opportunistic hunter. Recorded prey includes birds, insects, centipedes and rats, as well as seabird nestlings and adult bosun birds.

Breeding habitat: Breeding

Pairs build stick nests in tall forest trees and raise one or two chicks. The breeding season is August to January.

Pairs build stick nests in tall forest trees and raise one or two chicks. The breeding season is August to January.

Sheltering habitat: Shelter

Not documented in the published sources used for this profile.

Not documented in the published sources used for this profile.

Threats: Threats

Primary rainforest has been fragmented by clearing and dissected by roads and historic phosphate-exploration grid lines. Loss or fragmentation of rainforest may affect habitat needed for breeding.

Primary rainforest has been fragmented by clearing and dissected by roads and historic phosphate-exploration grid lines. Loss or fragmentation of rainforest may affect habitat needed for breeding.

Threats: Works risk

Clearing or fragmenting native rainforest could remove habitat and suitable nesting trees. Roads and other cleared corridors may further divide forest habitat.

Survey methodology: 1. Species-specific methods

Use methods consistent with the Commonwealth survey guidelines and engage a specialist with the right permits.

Systematic surveys across the island sampled more than 1,000 points across habitats; 95% of goshawk sightings were in rainforest.

Survey methodology: 2. Commonwealth guidance

For EPBC Act referrals, survey effort and methods should be consistent with the survey guidelines for Australia's threatened birds, read with the Significant impact guidelines 1.1.

Survey methodology: 3. Limits

A non-detection is not proof of absence. Match survey timing to the species and season, and record effort.

Vegetation associations: Rainforest or vine thicket

Source-checked associations and automatically indexed candidates are separated below. An association does not establish site presence, preference or dependence.

It occurs across the island’s forest types, from primary and marginal rainforest to secondary regrowth, and is also found around forest edges and clearings.

Automatically indexed from existing profile text. Not a verified preference, mapped occurrence or habitat requirement. Check the original source and regional qualifiers before use.

Evidence: Unreviewed profile-derived candidate

Confidence: Not independently verified

Region: Scope as described in the quoted profile text; not independently verified. Profile states: not specified.

Habitat use: general

Ecosystem associations

Source-checked associations and automatically indexed candidates are separated below. An association does not establish site presence, preference or dependence.

No species-specific ecosystem association has been indexed or source-checked in this evidence library. This is an evidence gap, not evidence of no association.

Soil and substrate associations

Source-checked associations and automatically indexed candidates are separated below. An association does not establish site presence, preference or dependence.

No species-specific soil association has been indexed or source-checked in this evidence library. This is an evidence gap, not evidence of no association.

Water and wetland associations

Source-checked associations and automatically indexed candidates are separated below. An association does not establish site presence, preference or dependence.

No species-specific water association has been indexed or source-checked in this evidence library. This is an evidence gap, not evidence of no association.

Fauna records and mapped habitat: Not yet analysed

Record locations can be overlaid with mapping, but record frequency alone does not measure habitat preference. No species is excluded from desktop assessments by this analysis.

No quality-controlled record-to-map analysis has been completed for this species. The existing generalised distribution dots and indicative range polygons have not been treated as precise occurrence coordinates.

A defensible run needs dated, independently attributable records, coordinate uncertainty, duplicate and captive-record checks, layer versions and regional scope. Preference and absence require additional survey-effort and detection evidence.

Habitat limitations and contrary evidence: No supported exclusion recorded

Not recorded is not the same as cannot occur. Low suitability, resident habitat, breeding habitat and occasional movement are different conclusions.

This library has not established a vegetation, ecosystem or soil-type exclusion for this species. This does not mean all habitat is suitable; the evidence needed to justify an exclusion has not been assembled.

Habitat limitations and contrary evidence: Before using a negative association

  • Confirm the taxon, geographic region, life stage and habitat function covered by the evidence.
  • Check survey methods, season, repeated effort and detectability before interpreting non-detection.
  • Investigate credible contradictory records and microhabitats absent from broad mapping.
  • Do not convert a missing map class, low record count or failed data request into species absence.

Before disturbance: 1. Desktop and approvals

Confirm whether the project could affect the species before works begin.

Check national mapping, state records and recent surveys for the site. An action likely to have a significant impact on this nationally listed species needs EPBC Act referral, and state permits apply where it is state listed.

Before disturbance: 2. Plan to avoid

Design the footprint, timing and access to avoid known or likely habitat, and brief crews on what to look for and who to call.

During disturbance: 1. Controls

Keep works inside the approved footprint and conditions.

Fence or mark habitat to be retained and keep machinery, stockpiles and spoil out of it.

During disturbance: 2. Stop and report

If the species is found unexpectedly, stop work at that spot and contact the project ecologist and the relevant agency.

After disturbance: 1. Records

Record outcomes.

Record sightings, habitat lost or retained and any injury or death, and report them under the approval conditions.

Rehabilitation: 1. Restore

Restore disturbed habitat where possible.

Reinstate disturbed ground with local species, return logs, rocks and litter, and control weeds and erosion until the site is stable.

Sources