[Length 7 in. Wingspan 9.5 in.]

This immature "Pacific" or "Nuttall's" White-crowned Sparrow was photographed in the foothills near Arroyo Grande, California, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: November 1981)

[Length 7 in. Wingspan 9.5 in.]

This immature "Pacific" or "Nuttall's" White-crowned Sparrow was photographed in the foothills near Arroyo Grande, California, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: November 1997)

[Length 7 in. Wingspan 9.5 in.]

This immature "Pacific" or "Nuttall's" White-crowned Sparrow was photographed in the foothills near Arroyo Grande, California, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: November 1997)

[Length 7 in. Wingspan 9.5 in.]

This "Pacific" or "Nuttall's" White-crowned Sparrow was photographed at Morro Bay, California, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: November 1997)

[Length 7 in. Wingspan 9.5 in.]

This "Rocky Mountain" White-crowned Sparrow was photographed in Rocky Mountain National Park, Colorado, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: June 1992)

[Length 7 in. Wingspan 9.5 in.]

This White-crowned Sparrow was photographed at Fossil Butte National Monument, Kemmerer, Wyoming, USA. Photo taken with a AF-S VR Zoom-Nikkor 80-400mm f/4.5-5.6G IF-ED lens on a Nikon D7100 camera. (Date: September 4, 2015)

[Length 7 in. Wingspan 9.5 in.]

This White-crowned Sparrow was photographed at the Moose Visitor Center, Gould (Walden), Colorado, USA. Photo taken with a AF-S VR Zoom-Nikkor 80-400mm f/4.5-5.6G IF-ED lens on a Nikon D7100 camera. (Date: June 1, 2016)

[Length 7 in. Wingspan 9.5 in.]

This White-crowned Sparrow (gambelii race) was photographed at Sam Nail Ranch, Big Bend National Park, Texas, USA. Photo taken with a AF-S VR Nikkor 300mm f/2.8G IF-ED lens + Nikkor TC14E II 1.4x Teleconverter (EFL=630mm) on a Nikon D300 camera. (Date: December 12, 2010)

[Length 7 in. Wingspan 9.5 in.]

This "Western" or "Gambel's" White-crowned Sparrow was photographed at the Andrews Bird Viewing Trail, Andrews, Texas, USA. Photo taken with a Nikkor 70-200mm EDAF-S VR f2.8 lens + Nikkor TC14E II 1.4x Teleconverter (EFL=420mm) on a Nikon D200 camera. (Date: November 20, 2007)