Chinese spot-billed duck

Anas zonorhyncha

Chinese vlekbekeend / Flecksnabelente / Canard à bec tacheté

The spot-billed duck is a dabbling duck which breeds in tropical and eastern Asia. This duck is around the same size as a mallard.

Anas poecilorhyncha (Sibley and Monroe 1990, 1993) has been split into A. poecilorhyncha and A. zonorhyncha following Leader et al. (2006), who presented evidence of sympatric breeding; this treatment is also accepted by AOU. 

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 appears to be decreasing, the 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 has not been quantified but is believed to be 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 (IUCN, 2013). The population is estimated to number between 0.8-1.6 million individuals.

More information: http://www.iucnredlist.org/details/22736042/0

Above: adult Chinese spot-billed duck

Above: adult Chinese spot-billed duck

Above: adult Chinese spot-billed duck

Above: a group of adult Chinese Spot-billed ducks

Above: Mallard-types from Asia and Australia. Click to enlarge.