The birds of North America
New York, U.S.A. :Published under the auspices of the Natural Science Association of America,1895, c1888.
biodiversitylibrary.org/page/41959147
The birds of North America
New York :Published under the auspices of the Natural Science Association of America,1903.
biodiversitylibrary.org/page/35159789
Monographie des picidées, ou Histoire naturelle des picidés, picumninés, yuncinés ou torcols;.
Metz,Typ. de J. Verronnais,1861-62..
biodiversitylibrary.org/page/40019203
Description: Female Williamson's Sapsucker Sphyrapicus thyroideus, Woodpecker family (Picidae). Stillwater Fork, Uinta, Utah. Date: 2 July 2016, 10:02. Source: 2016.07.02_10.02.52_IMG_6997. Author: Andrey Zharkikh from Salt Lake City, USA.
Description: Female Williamson's Sapsucker Sphyrapicus thyroideus, Woodpecker family (Picidae). Stillwater Fork, Uinta, Utah. Date: 2 July 2016, 10:02. Source: 2016.07.02_10.02.59_IMG_7000. Author: Andrey Zharkikh from Salt Lake City, USA.
Description: Female Williamson's Sapsucker Sphyrapicus thyroideus, Woodpecker family (Picidae). Stillwater Fork, Uinta, Utah. Date: 2 July 2016, 10:02. Source: 2016.07.02_10.02.55_IMG_6999. Author: Andrey Zharkikh from Salt Lake City, USA.
Description: Male Williamson's Sapsucker Sphyrapicus thyroideus, Woodpecker family (Picidae). Stillwater Fork, Uinta, Utah. I was busy with my plants when I noticed that this guy is expressing some concern about my presence. Seeing that I don't care about him, he revealed his home in the aspen tree nearby. This was a hasty shot. I set up my camera and waited for the next visit. The next was female with her beak full of tasty stuff. She had absolutely different appearance than her mate. Date: 2 July 2016, 09:57. Source: 2016.07.02_09.57.50_DSC05096. Author: Andrey Zharkikh from Salt Lake City, USA.
