Population information

Order name Pelicaniformes
Family name Phalacrocoracidae
Scientific name Phalacrocorax onslowi Common name Chatham Shag
Population name Chatham Is
Breeding range Chatham Island Non-breeding range
Red List Category Critically Endangered
Ramsar regions Oceania
Notes

Conservation Framework

Conservation framework Notes
No conservation frameworks
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 4 2005 2005 810 810 [S3483] [R64]
WPE 1 0 0 1 1,000 [R165]
WPE 2 0 0 1 1,000 [R165]
WPE 3 1999 1999 1,700 1,700 [R68]
WPE 5 2005 2005 810 810 [S6399] [R64]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 4 1997 2003 DEC [T2141] [R64]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 0 0 Unknown
WPE 5 1997 2003 DEC [T5315] [R64]

Population 1% level

Publication Yearset 1 percent Note
WPE 4 2006 8
WPE 1 1994 10
WPE 2 1997 10
WPE 3 2002 15
WPE 5 2012 8

References

  • R64 - BirdLife International. 2005. Threatened birds of the world 2005. Species factsheets available at?www.birdlife.org
  • R165 - Croxall, J.P., Evans, P.G.H. and Schreiber, R.W. (eds.). 1984. Status and Conservation of the World's Seabirds. ICBP Technical Publication No. 2. Cambridge, UK.
  • R68 - BirdLife International. (2000). Threatened Birds of the World. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife international

Notes

  • S3483 - In 2003 only 270 pairs (equivalent to 810 individuals) were counted. This may reflect a poor breeding season rather than population decline, but precautionarily a decline could be inferred (318).
  • T2141 - In 2003 only 270 pairs (equivalent to 810 individuals) were counted. This may reflect a poor breeding season rather than population decline, but precautionarily a decline could be inferred (285).
  • S6399 - In 2003 only 270 pairs (equivalent to 810 individuals) were counted. This may reflect a poor breeding season rather than population decline, but precautionarily a decline could be inferred (Hitchmough R., in litt. 2005.)
  • T5315 - In 2003 only 270 pairs (equivalent to 810 individuals) were counted. This may reflect a poor breeding season rather than population decline, but precautionarily a decline could be inferred (285).



Copyright Wetlands International 2012

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