Figure 4From: A review of Ireland's waterbirds, with emphasis on wintering migrants and reference to H5N1 avian influenzaDistribution and abundance of mallard ( Anas platyrhynchos ) in Ireland. These data were collected by BirdWatch Ireland as part of the Irish Wetland Bird Survey. The counts were conducted over the last 10 years, mainly from September to March. At each sampling site, the circle represents the maximum number of mallard supported, based on the maximum number observed at each of the recording sites on a single occasion during the last 10 years.Back to article page