Red Swamp Crayfish Procambarus clarkiiNon-native  -  Invasive    Synonyms: Louisiana Red Crayfish.
Kingdom Animalia   >   Phylum Arthropoda   >   Class Malacostraca   >   Order Decapoda   >   Family Cambaridae   >   Genus Procambarus   

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A Red Swamp Crayfish in Harford Co., Maryland (6/22/2015). Photo by Mark Johnson. (MBP list)

A Red Swamp Crayfish in Harford Co., Maryland (6/22/2015). Photo by Mark Johnson. (MBP list)

A Red Swamp Crayfish in Harford Co., Maryland (6/22/2015). Photo by Mark Johnson. (MBP list)

Procambarus clarkii in Worcester Co., Maryland (6/5/2005). Photo by Bill Hubick. (MBP list)

A Red Swamp Crayfish in Harford Co., Maryland (8/2/2013). Photo by Mark Johnson. (MBP list)

A Red Swamp Crayfish in Dorchester Co., Maryland (7/1/2013). Photo by Scott Housten. (MBP list)

A Red Swamp Crayfish in Montgomery Co., Maryland (5/5/2019). Photo by Andy Martin. (MBP list)

A Red Swamp Crayfish in Charles Co., Maryland (8/31/2017). Measured 79 mm. Photo by Robert Aguilar, SERC. (MBP list)

A Red Swamp Crayfish in Dorchester Co., Maryland (7/22/2018). Photo by Bill Hubick. (MBP list)

An adult Yellow-crowned Night-Heron feeding on an introduced Procambarus clarkii in Silver Spring, Maryland (8/4/2012). Despite our over-arching concerns about non-native crayfish, there are no complaints from local Yellow-crowned Night-Herons. Photo by Stephen Davies. (MBP list)

An immature Yellow-crowned Night-Heron feeding on a Red Swamp Crayfish in Kent Co., Maryland (7/11/2015). Photo by Jeff Culler. (MBP list)

A Red Swamp Crayfish in Prince George's Co., Maryland (6/21/2019). Photo by Emilio Concari. (MBP list)

Red Swamp Crayfish in Baltimore Co., Maryland (10/3/2020). (c) Nathaniel Schwartz, some rights reserved (CC BY-NC-ND). Photo by Nathaniel Schwartz via iNaturalist. (MBP list)

Red Swamp Crayfish in Anne Arundel Co., Maryland (Date obscured). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

Red Swamp Crayfish in Prince George's Co., Maryland (9/26/2020). (c) Benji Beluga, some rights reserved (CC BY-NC). Photo by Ben Springer. (MBP list)

Red Swamp Crayfish in Anne Arundel Co., Maryland (Date obscured). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

A Red Swamp Crayfish in Kent Co., Maryland (6/27/2017). Photo by Nancy Wyman. (MBP list)

Red Swamp Crayfish in Charles Co., Maryland (10/24/2021). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

A very young crayfish, nearly certainly a Red Swamp Crayfish found in Harford Co., Maryland (6/1/2013). Mikey Lutmerding notes its narrow rostrum and narrow/obliterated areola. Photo by Christine Yale. (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: https://mdinvasives.org/species-of-concern/.