American Black Duck Anas rubripes


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 <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).  Despite the fact that the population trend may be decreasing, there is some uncertainty and any potential overall decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Population justification
The global population is estimated to number 700,000 mature individuals (Partners in Flight 2020).

Trend justification
The species has been undergoing a moderate decline at an average rate of 1% per year between 1970 and 2017 (Partners in Flight 2020). Short-term trends are inconclusive however, as it appears that the trend is stabilising in recent years or even increasing (Meehan et al. 2018; Pardieck et al. 2018). Until detailed data becomes available, the species is here precautionarily assessed as being in slow decline.


Text account compilers
Hermes, C.

Butchart, S., Ekstrom, J. & Westrip, J.R.S.

Recommended citation
BirdLife International (2024) Species factsheet: Anas rubripes. Downloaded from on 01/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from on 01/03/2024.