Image by AnemoneProjectors from Wikimedia Commons under a CC BY-SA 2.0 license.
* Image may not have been verified for accuracy by NCBI Taxonomy.

Note: The laboratory rat Rattus norvegicus is occassionally misidentified as Rattus rattus. A certain number of the R. rattus sequence records are therefore likely to be from R. norvegicus. Sequence entries that are identified only by the English vernacular name "rats" are classified with "Rattus sp." Many of these entries are journal-scanned sequences from articles in which the scientific name of the organism does not appear (this is an editorial policy for model organisms in some journals). Most of these sequences are likely to be from Rattus norvegicus. If you want to make sure that you have all of the records for R. norvergicus, you should also retrieve the records for Rattus rattus and Rattus sp.