Population information
| Order name | Anseriformes | ||
|---|---|---|---|
| Family name | Anatidae | ||
| Scientific name | Thalassornis leuconotus | Common name | White-backed Duck |
| Population name | leuconotus, Eastern & Southern Africa | ||
| Breeding range | E, S 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 1 | 0 | 0 | 10,000 | 25,000 | No quality assessment | [R115] | ||
| WPE 2 | 0 | 0 | 10,000 | 25,000 | No quality assessment | [R115] | ||
| WPE 3 | 0 | 0 | 10,000 | 25,000 | No quality assessment | [R115] | ||
| WPE 4 | 0 | 0 | 10,000 | 25,000 | No quality assessment | [R115] | ||
| WPE 5 | 1990 | 1990 | 10,000 | 25,000 | Expert opinion | [R115] | ||
| AEWA CSR 4 | 1990 | 1990 | 10,000 | 25,000 | Expert opinion | [R115] | ||
| AEWA CSR 5 | 1990 | 1990 | 10,000 | 25,000 | Expert opinion | [R115] | ||
| AEWA CSR 6 | 1990 | 1990 | 10,000 | 25,000 | Expert opinion | [S8680] | [R115] | |
| AEWA CSR 7 | 1990 | 1990 | 10,000 | 25,000 | Best guess | [S9132] | [R115] | |
| AEWA CSR 8 | 1990 | 1990 | 10,000 | 25,000 | Best guess | [S9132] | [R115] |
Population trends
| Publication | Start year | End year | Trend | Trend quality | Notes | References | Actions |
|---|---|---|---|---|---|---|---|
| WPE 1 | 1980 | 1990 | STA | No quality assessment | [R115] | ||
| WPE 2 | 1980 | 1990 | STA | No quality assessment | [R115] | ||
| WPE 3 | 1980 | 1990 | STA | No quality assessment | [R115] | ||
| WPE 4 | 1980 | 1990 | STA | No quality assessment | [R115] | ||
| WPE 5 | 1980 | 1990 | STA | Poor | [R115] | ||
| AEWA CSR 4 | 1980 | 1990 | STA | Poor | [R115] | ||
| AEWA CSR 5 | 1980 | 1990 | STA | Poor | [R115] | ||
| AEWA CSR 6 | 2002 | 2012 | Unknown | No idea | |||
| AEWA CSR 7 | 2006 | 2014 | DEC | Reasonable | [R1548] | ||
| AEWA CSR 8 | 2008 | 2017 | DEC? | Reasonable | [T7238] | [R1619] |
Population 1% level
| Publication | Yearset | 1 percent | Note |
|---|---|---|---|
| WPE 1 | 1994 | 180 | |
| WPE 2 | 1994 | 180 | |
| WPE 3 | 1994 | 180 | |
| WPE 4 | 1994 | 180 | |
| WPE 5 | 2012 | 250 | |
| AEWA CSR 4 | -1 | -1 | Not Set |
| AEWA CSR 5 | -1 | -1 | Not Set |
| AEWA CSR 7 | 2012 | 250 | |
| AEWA CSR 8 | 2012 | 250 |
References
- R115 - Callaghan, D.A. and Green, A.J. 1993. Wildfowl at risk, 1993. Wildfowl 44: 149-169.
- 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. URL: http://iwc.wetlands.org/index.php/aewatrends
- R1619 - Nagy, S. & Langendoen, T. (2020) Flyway trend analyses based on data from the African-Eurasian Waterbird Census from the period of 1967-2018. Online publication. Wetlands International, Wageningen, The Netherlands. URL: http://iwc.test.wetlands.org/index.php/aewatrends8
Notes
- S8680 - IWC counts may reach ca. 1,000 for whole range. No significant new information for this rather thinly-spread species.
- S9132 - IWC counts may reach ca. 1,000 for whole range. No significant new information for this rather thinly-spread species.
- T7238 - The short-term trend is statistically uncertain but suggests a declining population. Based on the short-term growth rate of 0.931, the population is projected to decrease by 66% over 3 generations. The trend is also negative in the last 3 generations and a statistically significant decrease between 1999 – 2017. However, it is based on a very small sample size.
Copyright Wetlands International 2012 Citation: Wetlands International (). "Waterbird Population Estimates" . Retrieved from wpe.wetlands.org on