Population information

Order name Ciconiiformes
Family name Threskiornithidae
Scientific name Bostrychia bocagei Common name Dwarf Ibis
Population name São Tomé
Breeding range São Tomé Non-breeding range
Red List Category Critically Endangered
Ramsar regions Africa
Notes Collar et al. (1994) treated this population (Bostrychia olivacea bocagei) as full species (Bostrychia bocagei) to which they assign globally threatened status. (WPE2) . BirdLife International (2000) treats this population (Bostrychia olivacea bocagei) as a full species (Bostrychia bocagei) to which they assign Critically Endangered status. (WPE3)

Conservation Framework

Conservation framework Notes
No conservation frameworks
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 1 1993 1993 0 10 [R665]
WPE 2 1993 1993 0 50 [R138]
WPE 3 1999 1999 0 50 [R68]
WPE 4 2005 2005 0 50 [S4296] [R64]
WPE 5 2005 2005 50 249 [S7890] [R1215]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 3 0 0 Unknown
WPE 4 0 0 Unknown
WPE 5 0 0 Unknown No idea

Population 1% level

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

References

  • R665 - Unpublished information provided by IWRB Specialist Research Groups
  • R138 - Collar, N.J., Crosby, M.J. and Stattersfield, A.J. 1994. Birds to Watch 2. The World List of Threatened Birds. BirdLife Conservation series No. 4. BirdLife International, Cambridge, UK. 407 pp.
  • R68 - BirdLife International. (2000). Threatened Birds of the World. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife international
  • R64 - BirdLife International. 2005. Threatened birds of the world 2005. Species factsheets available at?www.birdlife.org
  • R1215 - BirdLife International 2012a Species factsheet: Bostrychia?bocagei. Downloaded from http://www.birdlife.org on 22/05/2012.

Notes

  • S4296 - 453 considers that the population numbers more than 50, but indicates that surveys are needed to clarify this.
  • S7890 - Melo, M. In litt. 2005. considers that the population numbers more than 50, but indicates that surveys are needed to clarify this.



Copyright Wetlands International 2012

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