Nesoryzomys darwini

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	MAMMALIA	RODENTIA	CRICETIDAE

Scientific Name:

Nesoryzomys darwini

Species Authority:

Osgood, 1929

Common Name/s:

English

–

Darwin's Galapagos Mouse

Assessment Information [top]

Red List Category & Criteria:

Extinct ver 3.1

Year Assessed:

2008

Assessor/s

Tirira, D., Dowler, R., Boada, C. & Weksler, M.

Evaluator/s:

Amori, G. (Small Nonvolant Mammal Red List Authority) & Schipper, J. (Global Mammal Assessment Team)

Justification:
N. darwini was apparently restricted to the island of Santa Cruz where it was first collected in 1906 and last seen in 1930. The extinction of this species is attributed to the introduction of the Black Rat Rattus rattus to the island in the late 1930s and due to pathogens to which the native species were susceptible or through direct competition with the introduced species. Other species introduced include House Mouse Mus musculus, the Norway Rat R. norvegicus and feral cats, all of which would also have had an impact on rodent decline and extinction. Recent repeated surveys have failed to locate any individuals of this species.

History:

1996	–	Extinct
1994	–	Extinct (IUCN)

Geographic Range [top]

Range Description:	This species was endemic to Galápagos Islands. It was found on Santa Cruz (= Indefatigable) Island (Dowler et al., 2000; Patton and Hafner, 1983). It is extinct, last recorded in 1930 (Musser and Carleton, 1993). Recent field work by R. Dowler during 1997 did not find the species (Dowler et al. 2000).
Countries:	Regionally extinct: Ecuador (Galápagos)
Range Map:	(click map to view full version)

Population [top]

Population:	This species is extinct.

Population:

This species is extinct.

Habitat and Ecology [top]

Habitat and Ecology:	There is no information on the habitat and ecology of this species.
Systems:	Terrestrial

Threats [top]

Major Threat(s):	The introduction of the black rat (Rattus rattus) is the main cause of the extinction of this species.

Major Threat(s):

The introduction of the black rat (Rattus rattus) is the main cause of the extinction of this species.

Conservation Actions [top]

Conservation Actions:	The species is extinct.

Conservation Actions:

The species is extinct.

Citation:	Tirira, D., Dowler, R., Boada, C. & Weksler, M. 2008. Nesoryzomys darwini. In: IUCN 2009. IUCN Red List of Threatened Species. Version 2009.2. <www.iucnredlist.org>. Downloaded on 21 November 2009.
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