English: Mourning Warbler, Oporornis philadelphia, female (upper) and male (lower), offset reproduction of watercolor
Date between 1910 and 1914
Source Birds of New York (New York State Museum. Memoir 12), Albany: University of the State of New York. Plates by Fuertes later reproduced in Birds of America (1917?) by Thomas Gilbert Pearson (1873-1943) et al.
Author Elon Howard Eaton (1866-1935, author), Louis Agassiz Fuertes (artist, 1874-1927) https://en.wikipedia.org/wiki/Louis_Agassiz_Fuertes
Source: https://commons.wikimedia.org/wiki/File:Oporornis_philadelphiaAAP100CB1.jpg

The mourning warbler (Geothlypis philadelphia) is a small songbird of the New World warbler family. Their breeding habitat is thickets and semi-open areas with dense shrubs across Canada east of the Rockies and the northeastern United States. These birds migrate to Central America and northern South America. The "mourning" in this bird's name refers to the male's hood, thought to resemble a mourning veil. Order: Passeriformes, Family: Parulidae, Genus: Geothlypis, Species: Geothlypis philadelphia (Wilson, 1810), Synonyms: Oporornis philadelphia.