Saturday, November 21, 2020

Gadwall

The Gadwall white wing patch is smaller on a female than on a male, but in both sexes this field mark may be hidden, as in the male in this photograph. Erika and I took this image at the Billy Frank Jr National Wildlife Refuge on 9 November 2020. Despite having a huge range across mid latitudes of North America, Asia, and eastern Europe, only two subspecies are currently recognized. Mareca strepera couesi was described from the southwest Pacific in 1874. Two birds were shot, both the size or a teal, and this small race has not been seen again and is assumed to be extinct (Leschaek et al. 2020).

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