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Orconectes virilis

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Title: Orconectes virilis  
Author: World Heritage Encyclopedia
Language: English
Subject: List of fauna of Michigan, Castlewood Canyon State Park, Horsehair crab, Cryphiops caementarius, Oratosquilla oratoria
Publisher: World Heritage Encyclopedia

Orconectes virilis

Orconectes virilis
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Order: Decapoda
Family: Cambaridae
Genus: Orconectes
Species: O. virilis
Binomial name
Orconectes virilis
(Hagen, 1870) [1]

Orconectes virilis is a species of crayfish known as the virile crayfish or the northern crayfish.


Orconectes virilis can be found under stones in lakes, streams and wetlands, where they hide from predators, such as fish. They are identified by the brown of rust-red carapace and large chelipeds, which are usually blue in colour. Orconectes virilis feeds on a wide range of plants and invertebrates, as well as tadpoles and even small fish.


Juvenile's greenish colour will turn red on the carapace and blue on the claws with age

Orconectes virilis is found in southern Canada from Alberta to Quebec and in the northern United States, but has become an invasive species in parts of North America outside its native range, and was discovered in the United Kingdom in 2008.[2] It is listed as a species of Least Concern on the IUCN Red List.[3]


Orconectes virilis is used as fishing bait and as food for humans, and also as aquarium food for carnivorous fish.[4]


  1. ^ "Orconectes virilis".  
  2. ^ Daniel Ahern, Judy England & Adam Ellis (2008). (Hagen, 1870) (Crustacea: Decapoda: Cambaridae), identified in the UK"Orconectes virilis"The virile crayfish, .  
  3. ^ S. Adams, G. A. Schuster & C. A. Taylor (2010). "Orconectes virilis".  
  4. ^ Krista Kagume (2008). Ontario Nature Guide.  

External links

  • "UK Crayfish Website". Buglife – The Invertebrate Conservation Trust. 
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