Population information

Order name Podicipediformes
Family name Podicipedidae
Scientific name Podiceps nigricollis Common name Black-necked Grebe
Population name gurneyi, Southern Africa
Breeding range Southern Africa Non-breeding range
Red List Category Least Concern
Ramsar regions Africa
Notes

Conservation Framework

Conservation framework Notes
AEWA
Note:

Population size

Publication Start year End year Minimum Maximum Estimate quality Notes References Actions
WPE 3 0 0 10,000 20,000 [R295]
WPE 4 0 0 10,000 20,000 [R295]
WPE 1 0 0 -1 -1
WPE 2 0 0 -1 -1
WPE 5 2010 2010 20,000 30,000 Expert opinion [S7575] [R909]
CSR 4 1981 1981 10,000 20,000 Expert opinion
CSR 5 2010 2010 20,000 30,000 Expert opinion [S3177] [R909]
CSR 6 1991 2013 15,000 30,000 Census based [S8599] [R1371]

Population trends

Publication Start year End year Trend Trend quality Notes References Actions
WPE 3 1990 2000 INC [R579]
WPE 4 1990 2000 INC [R579]
WPE 1 0 0 Unknown
WPE 2 0 0 Unknown
WPE 5 1990 2000 INC Poor [R579]
CSR 4 1990 2000 INC Poor [R579]
CSR 5 1990 2000 INC Poor [R579]
CSR 6 1991 2013 FLU Good [T6593] [R1371] [R1381]

Population 1% level

Publication Yearset 1 percent Note
WPE 3 2002 150
WPE 4 2006 150
WPE 1 0 -1
WPE 2 0 -1
WPE 5 2012 240
CSR 4 0 -1
CSR 5 0 -1

References

  • R295 - Harrison, J.A., Allan, D.G., Underhill, L.G., Herremans, M., Tree, A.J., Parker, V. and Brown, C.J. (1997). The Atlas of Southern African Birds. Vol.1. BirdLife South Africa, Johannesburg. 785 pp.
  • R579 - Scott, D.A. in press, 2002. Report on the Conservation Status of Migratory Waterbirds in the Agreement Area. Update Report to African Eurasian Migratory Waterbird Agreement Secretariat
  • R909 - Kolberg, H. in litt. 2011
  • R1371 - Dodman, T. 2014. Status, Estimates and Trends of Waterbird Populations in Africa: AEWA-listed African populations. Wetlands International. (CSR6 African populations) URL: https://www.wetlands.org/publications/1304/
  • R1381 - Nagy, S., Flink, S., Langendoen, T. (2014) Waterbird trends 1988-2012: Results of trend analyses of data from the International Waterbird Census in the African-Eurasian Flyway. Wetlands International, Ede.
  • R1548 - Wetlands International (2017) Flyway trend analyses based on data from the African-Eurasian Waterbird Census from the period of 1967-2015. Ede, The Netherlands: Wetlands International. Temporary URL: https://www.dropbox.com/sh/r76f4eyuhzu65co/AADzzQkhySsUDsmwFJUcHs91a?dl=0

Notes

  • S7575 - Kolberg, H. In litt. 2011. Over the past few wetland counts consistently high numbers have been counted at Walvis Bay alone (including almost 24,000 birds in July 2008 and almost 20,000 birds in July 2010).
  • S3177 - 919. Over the past few wetland counts consistently high numbers have been counted at Walvis Bay alone (including almost 24,000 birds in July 2008 and almost 20,000 birds in July 2010).
  • S8599 - Based on July counts, especially from Walvis Bay, Namibia
  • T6593 - Trend is most likely linked to seasonal rains; IWC data suggests an increase of 5.31% (+/-1.10) from 1991-2001, but fluctuating between 2003 and 2012.
  • T6793 - Overall stable since 1980 with large year-to-year fluctuations. Dodman (2014) assumes that the trend is linked to seasonal rains. Strong increase in the short term (Wetlands International 2017).



Copyright Wetlands International 2012

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