<p>Male and female Gadwalls, and male Coues' Gadwall (Anas strepera couesi) illustrated as the bird on the right by Louis Agassiz Fuertes (1874 – 1927).
</p><p>From A natural history of the ducks. Volume.II. The Genus Anas By John C. Phillips
Associate curator of birds in the Museum of Comparative Zoology at Harvard College
with plates in color and in black and white
</p>
from drawings Frank W. Benson, Allan Brooks, Louis Agassiz Fuertes and Henrik Grönvold.
<bdi><a href="https://en.wikipedia.org/wiki/en:Louis_Agassiz_Fuertes" class="extiw" title="w:en:Louis Agassiz Fuertes"><span title="United States ornithological artist (1874-1927)">Louis Agassiz Fuertes</span></a>
</bdi>
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