Rattus exulans 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Rodentia Muridae

Scientific Name: Rattus exulans (Peale, 1848)
Common Name(s):
English Polynesian Rat

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2016-08-17
Assessor(s): Ruedas, L., Heaney, L. & Molur, S.
Reviewer(s): Amori, G.
Listed as Least Concern in view of its wide distribution, tolerance of a broad range of habitats, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is widespread throughout both mainland and insular Southeast Asia (including the islands of Taiwan, Sumatra, Java, Bali and Borneo) (Corbet and Hill 1992; Musser and Carleton 2005). It is likely introduced and widespread in the Philippines and several Indonesian islands (including Sulawesi, Buru, Lombok, Sumbara, Flores), the island of New Guinea (approximate range only given). It has also been widely introduced throughout the Pacific (Corbet and Hill 1992; Musser and Carleton 2005). It is now extinct from North Island, New Zealand (Flannery 1995). The map for this species depicts only an estimate of the species extensive range.
Countries occurrence:
Bangladesh; Cambodia; Indonesia; Lao People's Democratic Republic; Malaysia; Myanmar; Thailand; Viet Nam
American Samoa; Brunei Darussalam; Christmas Island; Cocos (Keeling) Islands; Cook Islands; Fiji; French Polynesia; Guam; Kiribati; Marshall Islands; Micronesia, Federated States of ; Nauru; New Caledonia; New Zealand; Niue; Norfolk Island; Northern Mariana Islands; Palau; Papua New Guinea; Philippines; Samoa; Singapore; Solomon Islands; Timor-Leste; Tokelau; Tonga; Tuvalu; United States (Hawaiian Is.); United States Minor Outlying Islands; Vanuatu; Wallis and Futuna
Present - origin uncertain:
Taiwan, Province of China
Additional data:
Upper elevation limit (metres):250
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It is an abundant species.
Current Population Trend:Stable
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is present in a wide variety of habitats, including disturbed or agricultural land. In the Philippines, it occurs in agricultural areas throughout the country at all elevations (Barbehenn et al. 1973; Rabor 1986). Often present in disturbed forest (e.g. Danielsen et al. 1994), usually rare in primary forest, but may be common in primary forest on islands such as Negros with few native rodents (Heaney et al. 1989). In South Asia, it is a nocturnal and probably commensal species. It occurs in tropical and subtropical dry deciduous forests, tropical and subtropical mangrove forests. Coastal hilly forest with human settlements in lowlands (Molur et al. 2005).
Generation Length (years):1

Threats [top]

Major Threat(s): There are no major threats to this species.

Conservation Actions [top]

Conservation Actions: It is presumably present in many protected areas.

Errata [top]

Errata reason: This errata assessment has been created because the map was accidentally left out of the version published previously.

Citation: Ruedas, L., Heaney, L. & Molur, S. 2016. Rattus exulans (errata version published in 2017). The IUCN Red List of Threatened Species 2016: e.T19330A115146549. . Downloaded on 26 September 2018.
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