Norway Rat Rattus norvegicus (Berkenhout, 1769)Non-native  -  Invasive    Synonyms: Brown Rat.
Kingdom Animalia   >   Phylum Chordata   >   Class Mammalia   >   Order Rodentia   >   Family Muridae   >   Genus Rattus   


Host to the flea Nosopsyllus fasciatus, which was introduced to North America along with this species (Eckerlin, 2011).

There are 90 records in the project database.

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Norway Rat in Montgomery Co., Maryland (4/23/2017). (c) Wendy R Fredericks, some rights reserved (CC BY-NC). Photo by Wendy R. Fredericks. (MBP list)

A Norway Rat in Baltimore Co., Maryland (3/3/2016). Photo by Joyce Stevens. (MBP list)

Norway Rat in Baltimore City, Maryland (12/6/2022). (c) Molly Cohn, some rights reserved (CC BY-NC). Photo by Molly Cohn via iNaturalist. (MBP list)

A Norway Rat found dead in Baltimore Co., Maryland (9/11/2014). Photo by Jane Marlow. (MBP list)

Baby Norway Rats in Wicomico Co., Maryland (9/17/2022). (c) apb24, some rights reserved (CC BY-NC). Photo by apb24 via iNaturalist. (MBP list)

Norway Rat in Howard Co., Maryland (2/20/2017). Photo by Sue Muller. (MBP list)

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MBP marks as "Invasive" any taxon listed in the Maryland Invasive Species Council (MISC) list of Invasive Species of Concern in Maryland. You can read their criteria and review the lists here:

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