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Scapteromys tumidus

Uruguay Swamp Rat


Scapteromys tumidus

Waterhouse, 1837
Rata de Pajonal
Family: Cricetidae
Order: Rodentia
Class: Mammalia
Phylum / Division: Chordata
Kingdom: Animalia
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Records from Santiago Vazquez

Conservation status: Least Concern


Description


Waterhouse´s swamp rat (Scapteromys tumidus) is a semiaquatic rodent species from South America. It is found in southern Brazil, Uruguay and northern Argentina, where it lives in freshwater and salt marshes, as well as open grassland of the pampas. Its karyotype has 2n = 24, substantially lower than its closest relative S. aquaticus with 2n = 32.

Source: Wikipedia, article Scapteromys tumidus. Content adapted from Wikipedia, available under the CC BY-SA 4.0 license. Accessed on 17/07/2026.





Geographic distribution


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Species photographs

Last published photographs

Foto
Photography ID: 498219
 Santiago Vazquez
Montevideo
Uruguay
10/22/2021
Santiago Ramos



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Species vocalizations

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Species reports



 Detail of places sorted by number of records







Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
148554322/10/2021UruguayMontevideoLado noreste de la Avenida Luis Batlle Berres, entre Santiago Vazques y arroyo de las mulas., Santiago Vazquez1Santiago Ramos
Page 1

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Recommended citation
Please use the following reference when citing this species account.
EcoRegistros. 2026. Uruguay Swamp Rat (Scapteromys tumidus) – Species account. Accessed from www.ecoregistros.org on 24/09/2026.