Two-spot Lady Beetle

Adalia bipunctata

General Status Rank: 
Secure
Common Name: 
Two-spot Lady Beetle
Scientific Name: 
Adalia bipunctata
Naming References: 
Taxonomy
Group: 
Beetle
Kingdom: 
Animalia
Phylum: 
Arthropoda
Class: 
Insecta
Order: 
Coleoptera
Family: 
Coccinellidae
General Biology
Canada Known Subspecies Count: 
0

Economic/Human Considerations

biological control agent against aphids in greenhouses
Distribution

Distribution

Nt: appears widespread below the treeline, no specific localities provided (Gordon 1985);Aklavik, Ft Smith, east arm of GSL (A266); amounting to ~500,000 km2 (Environment and Natural Resources. 2018. A Field Guide to Lady Beetles of the Northwest Territories. ENR, GNWT, Yellowknife, NT. 75 p.).
Score: 
G
References: 

Number of Occurrences

Nt: appears widespread below the treeline, no specific localities provided (Gordon 1985);Aklavik, Ft Smith, east arm of GSL (A266);I - 3 records known from 3 localities (databased records); 6 widespread localities given in the Lady Beetles of the Northwest Territories - amounting to ~500,000 km2 (Environment and Natural Resources. 2018. A Field Guide to Lady Beetles of the Northwest Territories. ENR, GNWT, Yellowknife, NT. 75 p.).
Score: 
AD
References: 

Area of Occupancy

Score: 
-
Population

Density

Aklavik, Ft Smith, east arm of GSL (A266);t: appears widespread below the treeline, no specific localities provided (Gordon 1985; A265)
References: 
Threats

Intrinsic Vulnerability

Score: 
C
General Status Rank
Rank: 
Secure
Status Rank Description: 
Nt: appears widespread below the treeline, no specific localities provided (Gordon 1985);Aklavik, Ft Smith, east arm of GSL (A266);
S Rank: 
S3S5
Decision Process Description: 
Draft ranks from Dave McCorquodale of University College of Cape Breton (2010), but see McNamara (1991;W037, W069) about probable introduction; Reviewed ranks by Chandra Venables (2012) under contract for northern beetles assessment with Environment Canada (National General Status Assessment).; Reviewed ranks by Chandra Venables (2012-2014) under contract for northern beetles assessment with Environment Canada (National General Status Assessment) – no change; Reviewed in 2020 by Charlene Wood, no change
Last Updated: 
July 30, 2020

References

Density

  • Gordon, RD. (1985) The Coccinellidae (Coleoptera) of America north of Mexico.. Journal of the New York Entomological Society. 93(1): 1-912. - A265 Return
  • Belicek, J. (1976) Coccinellidae of Western Canada and Alaska with analyses of the transmontane zoogeographic relationships between the fauna of British Columbia and Alberta (Insecta: Coleoptera: Coccinellidae).. Quaestiones Entomologicae. 12: 283-409. - A266 Return

Naming

  • McNamara. J. (1991) Family Coccinellidae (Ladybird beetles). Agriculture Canada Pub. 1861/E in Checklist of Beetles of Canada and Alaska. Bousquet, Y. (Web page verison accessed 3 Jan 2008) http://www.canacoll.org/Coleo/Checklist/checklist.htm - W037 Return

Number of Occurrences

  • Gordon, RD. (1985) The Coccinellidae (Coleoptera) of America north of Mexico.. Journal of the New York Entomological Society. 93(1): 1-912. - A265 Return
  • Belicek, J. (1976) Coccinellidae of Western Canada and Alaska with analyses of the transmontane zoogeographic relationships between the fauna of British Columbia and Alberta (Insecta: Coleoptera: Coccinellidae).. Quaestiones Entomologicae. 12: 283-409. - A266 Return

Range Extent

  • Belicek, J. (1976) Coccinellidae of Western Canada and Alaska with analyses of the transmontane zoogeographic relationships between the fauna of British Columbia and Alberta (Insecta: Coleoptera: Coccinellidae).. Quaestiones Entomologicae. 12: 283-409. - A266 Return