Data Zone
Justification of Red List category
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence under 20,000 km² combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population size may be moderately small to large, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (under 10,000 mature individuals with a continuing decline estimated to be over 10% in ten years or three generations, or with a specified population structure). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (over 30% decline over ten years or three generations). For these reasons the species is evaluated as Least Concern.
Population justification
The global population size is estimated at 25,751-82,500 individuals (Wetlands International 2023), which equates to 17,200-55,000 mature individuals. The overall population trend is suspected to be decreasing over three generations (13.29 years) (Wetlands International 2023).
Trend justification
.
Behaviour This species is known to undertake considerable nomadic movements in response to changing water levels (many of its favoured sites are ephemeral) (Scott and Rose 1996), and it is an irregular and opportunistic breeder, varying its time of breeding with rainfall (Brown et al. 1982). Throughout both breeding and non-breeding seasons the species is dispersed in single pairs or small flocks of 3-7 birds; large flocks in the moulting season are recorded rarely, when some gatherings can be as large as 2,000 strong (Madge and Burn 1988, Kear 2005b). The species is diurnal, with most of its activity occurring between 0700-0900 (Hockey et al. 2005) and 1300-1700 (Brown et al. 1982), although occasionally the species may also forage at night (Hockey et al. 2005). Habitat This species frequents shallow saline lakes, seasonal and permanent brackish or saline pools and vleis, rivers, seasonally flooded wetlands, farm dams, state reservoirs, coastal shorelines, estuaries, lagoons, tidal mudflats and wastewater treatment pools (Johnsgard 1978, Madge and Burn 1988, Dowsett 2004, Hockey et al. 2005, Kear 2005b). In the East African Rift Valley it occurs from the lowlands up to 1,700 m (Scott and Rose 1996) on small, sheltered alkaline and brackish waters with little or no shoreline vegetation, moving to permanent alkaline waters when nearby temporal pools become dry (Baker 2003). In the Western Cape of South Africa this species moves to deep, open waters on which to moult, and prefers to breed on bare and grassy pans (Hockey et al. 2005). Diet It has an omnivorous diet, feeding on the stems, leaves and seeds of pondweeds, as well as aquatic insects, crustaceans and tadpoles (Johnsgard 1978). Breeding site Females prefer to locate nests on islands where possible, although nest sites can be some distance from the water. The nest itself is a hollow scrape in the ground, well concealed amongst small trees, thorny bushes or aquatic vegetation (Johnsgard 1978, del Hoyo et al. 1992, Kear 2005b).
This species is susceptible to avian botulism (Blaker 1967, van Heerden 1974), especially when feeding on sewage and effluent ponds (Hockey et al. 2005), so may be threatened by future outbreaks of the disease. It is also potentially threatened by habitat loss through wetland destruction and degradation, for example Walvis Bay in Namibia (a key wetland site in southern Africa) is being degraded through changes in the flood regime due to road building, wetland reclamation for suburb and port development, and disturbance from tourism (Wearne and Underhill 2005). Utilisation The species is highly valued and commonly shot (del Hoyo et al. 1992, Little et al. 1995), although there is no evidence that the hunting of this species currently poses a threat.
Text account compilers
Rutherford, C.A.
Contributors
Dodman, T.
Recommended citation
BirdLife International (2024) Species factsheet: Cape Teal Anas capensis. Downloaded from
https://datazone.birdlife.org/species/factsheet/cape-teal-anas-capensis on 27/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 27/12/2024.