[Length 6.25 in. Wingspan 7.75 in.]

This Olive Sparrow was photographed at Santa Ana NWR, Texas, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: April 2000)

[Length 6.25 in. Wingspan 7.75 in.]

This olive Sparrow was photographed at the National Audubon Society's Sabal Palms Sanctuary in Brownsville, Texas, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodak Elitechrome 200 film. (Date: April 2001)

[Length 5.5 in. Wingspan xx in.]

This Rufous-collared Sparrow was photographed at the ProAves El Dorado Reserve, Sierra Nevada de Santa Marta, Department Magdalena, Colombia. Photo taken with a AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED lens (EFL=450mm) on a Nikon D200 camera. (Date: June 9, 2009)

[Length 6 in. Wingspan 7.5 in.]

Rufous-crowned Sparrows are residents of the southwestern US. This one was photographed from a singing perch on the tip of a Yucca spine in the foothills of the Davis Mountains in western Texas, USA. Photo taken with a 300mm f4.5 Nikkor ED lens on Kodachrome 200 film pushed to 800. (Date: May 1993)

[Length 6 in. Wingspan 7.5 in.]

This "Eastern" Rufous-crowned Sparrow was photographed from a singing perch on the tip of a Yucca spine in the foothills of the Davis Mountains in western Texas, USA. Photo taken with a 300mm f4.5 Nikkor ED lens on Kodachrome 200 film pushed to 800. (Date: May 1993)

[Length 6 in. Wingspan 7.5 in.]

This "Eastern" Rufous-crowned Sparrow was photographed from a singing perch on the tip of a Yucca spine in the foothills of the Davis Mountains in western Texas, USA. Photo taken with a 300mm f4.5 Nikkor ED lens on Kodachrome 200 film pushed to 800. (Date: May 1993)

[Length 6 in. Wingspan 7.5 in.]

This "Eastern" Rufous-crowned Sparrow was photographed from a singing perch on the tip of a Yucca spine in the foothills of the Davis Mountains in western Texas, USA. Photo taken with a 300mm f4.5 Nikkor ED lens on Kodachrome 200 film pushed to 800. (Date: May 1993)

[Length 5.75 in. Wingspan 7.5 in.]

This Rufous-winged Sparrow was photographed at Gardner Canyon Road, Sonoita, Arizona, USA. Photo taken with a AF-S VR Nikkor 300mm f/2.8G IF-ED lens + Nikkor TC17E II 1.7x Teleconverter on a Nikon D7100 camera. (Date: July 13, 2013)

[Length 5.75 in. Wingspan 7.5 in.]

This Rufous-winged Sparrow was photographed at Gardner Canyon Road, Sonoita, Arizona, USA. Photo taken with a AF-S VR Nikkor 300mm f/2.8G IF-ED lens + Nikkor TC17E II 1.7x Teleconverter on a Nikon D7100 camera. (Date: July 13, 2013)