Population information

Order name Ciconiiformes
Family name Ardeidae
Scientific name Nycticorax nycticorax Common name Black-crowned Night-heron
Population name hoactli, North America (bre)
Breeding range North America Non-breeding range S USA, Caribbean, C America, S America
Red List Category Least Concern
Ramsar regions Neotropics North America
Notes Ascribed to subspecies hoactli (J. F. Gmelin, 1789) . In WPE2 this population belonged to one single population (N.n. nycticorax, North America/N Neotropics).

Conservation Framework

Conservation framework Notes
No conservation frameworks
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 3 0 0 75,000 150,000 [R106]
WPE 4 0 0 75,000 150,000 [R106]
WPE 5 1999 2011 75,000 150,000 Expert opinion [S7736] [R106]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1990 2000 STA [R570]
WPE 4 1990 2000 STA [R570]
WPE 5 1990 2000 STA [R570]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 1100
WPE 4 2006 1100
WPE 5 2012 1100

References

  • R106 - Butler, R.W., Kushlan, J.A. and Davidson, I.J. 2000. Herons in North America, Central America and the West Indies. Pp 151-175 in: Heron Conservation (James.A. Kushlan and Heinz Hafner, Eds.). Academic Press, London.
  • R570 - Schlatter, R. (In litt.). 2002. Unpublished information on Southern South American waterbirds.

Notes

  • S7736 - 2,500-5,000 breeding pairs estimated for Canada (Weseloh, C. In litt. 2012).



Copyright Wetlands International 2012

Citation: Wetlands International (). "Waterbird Population Estimates" . Retrieved from wpe.wetlands.org on