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Nycticorax caledonicus

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA AVES CICONIIFORMES ARDEIDAE

Scientific Name: Nycticorax caledonicus
Species Authority: (Gmelin, 1789)
Common Name/s:
English – Nankeen Night Heron, Nankeen Night-Heron, Rufous Night-heron, Rufous Night Heron, Rufous Night-Heron
Taxonomic Notes:

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2012
Assessor/s: BirdLife International
Reviewer/s: Butchart, S. & Symes, A.
Contributor/s:
Justification:
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be fluctuating, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
History:
2009 – Least Concern
2008 – Least Concern
2004 – Least Concern

Geographic Range [top]

Range Description: Nycticorax caledonicus occurs in the Philippines, Indonesia, Australia, Papua New Guinea, the Solomon Islands, Palau, New Caledonia (to France) and the Caroline Islands, Federated States of Micronesia. The subspecies crassirostris, which was endemic to Japan's Bonin Islands, has been extinct since the late 1800s (del Hoyo et al. 1992).
Countries:
Native:
Australia; Brunei Darussalam; Christmas Island; Cocos (Keeling) Islands; Indonesia; Malaysia; Micronesia, Federated States of; New Caledonia; Northern Mariana Islands; Palau; Papua New Guinea; Philippines; Solomon Islands; Timor-Leste
Possibly extinct:
Japan
Introduced:
New Zealand
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population Trend: Stable

Habitat and Ecology [top]

Systems: Terrestrial; Freshwater; Marine
Citation: BirdLife International 2012. Nycticorax caledonicus. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 23 May 2013.
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