Taxon name
Rattus norvegicus
(Berkenhout, 1769)
Uploaded by
National Red List Database
Taxonomic information
Scientific name
Rattus norvegicus
(Berkenhout, 1769)
Common name(s)
Brown Rat, Geso Indur or Badami Indur
Assessed taxon level
Species
Higher level taxonomic groupings
Vertebrates
Mammals
Species authority
(Berkenhout, 1769)
Taxonomic notes and synonyms listed
Rattus norvegicus is occasionally misidentified as Rattus rattus.
Rattus decimallus Pallas, 1779; Rattus caraco Pallas, 1779; Rattus caspius Oken, 1816
Location and scope
Specific locality or subnational name or regional name
Bangladesh
Scope (of the Assessment)
National
Countries included within the scope of the assessment
Does the assessment cover a marine EEZ area(s)?
Not_assigned
Conservation Status
Assessed as
Least Concern
Criteria system used
IUCN
(see Assessment details)
Assessment rationale/justification
Due to wide distribution and occurrence in large numbers as well as absence of any threat, this species has been considered as Least Concern.
Assessment details
Assessors/contributors/reviewers listed
Mohammad Firoj Jaman
Criteria system used
IUCN
Reference for methods given
IUCN (2012) IUCN Red List Categories and Criteria: Version 3.1. Second edition. Gland, Switzerland and Cambridge, UK: IUCN. iv + 32pp; IUCN (2012) Guidelines for Application of IUCN Red List Criteria at Regional and National Levels: Version 4.0. Gland, Switzerland and Cambridge, UK: IUCN. iii + 41pp.
URL (link) of redlist assessment or publication
http://iucnredlistbd.org/
Further information
Endemism (according to assessment)
Taxon distribution as listed in assessment
Originally native to south east Siberia, north east China and parts of Japan, but it occurs worldwide as an introduced species (Nowak and Paradiso 1983). It is one of the commonest rat species of the country distributed all over terrestrial habitats (Khan 2015).
Is there a map available in assessment?
Yes, in the publication/on website
Habitat and systems
Ecological system type
Habitat
Habitat details as listed in assessment
It lives in all types of habitats except water bodies without any vegetation or floating material. It is at home in the cities as well as in the villages or the crop fields.The Brown Rat, also called Tree Rat is the most arboreal among the rats found in the countryside and forests. It usually lives in pairs or in a family group in a burrow or tree-nest and group being dominated a male that often defends its virtually borderless territory against an intruding male. It is a true omnivore (Sarker et al. 2013). This species has an acute sense of hearing and sensitive to ultrasound. It is a good swimmer, both on the surface and underwater. During excessive flood it climbs to trees and leads its normal life there up to the time the water recedes (Khan 1985, 1987, Nowak and Paradiso 1983, Parker 1990). This spcies also produces communicative noises audidle to humans.
History
Data Deficient in Bangladesh (IUCN Bangladesh 2000).
Publication
IUCN Bangladesh. 2015. Red List of Bangladesh Volume 2: Mammals. IUCN, International Union for Conservation of Nature, Bangladesh Country Office, Dhaka, Bangladesh, pp. xvi+232
