[Length 6.25 in. Wingspan 9.5 in.]

This American Tree Sparrow was photographed at Cheyenne Bottoms WMA, Great Bend, Kansas, USA. 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: March 15, 2010)

[Length 6.25 in. Wingspan 9.5 in.]

This American Tree Sparrow was photographed in mid-winter near a feeder in central New Jersey, USA. Photo taken with a 750 f5.6 Celestron mirror lens on Ektachrome 200 film pushed to 400. (Date: February 1979)

[Length 6 in. Wingspan 7.25 in.]

Bachman's Sparrows breed in open pine and mixed forests of the southeastern US. Their preferred habitat requires periodic burning of the understory to keep the woodlands open. This male was photographed on a bush used as a singing perch in Carteret County, North Carolina, USA. Photo taken with a 300mm f4.5 Nikkor ED lens on Kodachrome 200 film.. (Date: May 1990)

[Length 5.5 in. Wingspan 8.75 in.]

This Baird's Sparrow was photographed near Brandon, Manitoba, Canada. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: June 1991)

[Length 6 in. Wingspan 8.25 in.]

This "Southern Interior" Bell's Sparrow was photographed at Piute Mountains, California, 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: July 3, 2013)

[Length 6 in. Wingspan 8.25 in.]

This "Southern Interior" Bell's Sparrow was photographed at Piute Mountains, California, 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: July 3, 2013)

[Length 5.5 in. Wingspan 7.75 in.]

This Black-chinned Sparrow was photographed at the Nature Conservancy's Davis Mountains' Preserve near Fort Davis, Texas, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: June 2000)

[Length 5.5 in. Wingspan 7.75 in.]

This Black-throated Sparrow was photographed at South Llano River State Park, Junction, Texas, USA. Photo taken with a Nikkor 70-200mm EDAF-S VR f2.8 lens + Nikkor TC20E II 2.0x Teleconverter (EFL=600mm) on a Nikon D100 camera. (Date: April 7, 2006)

[Length 5.5 in. Wingspan 7.75 in.]

This Black-throated Sparrow was photographed at South Llano River State Park, Junction, Texas, USA. Photo taken with a Nikkor 70-200mm EDAF-S VR f2.8 lens + Nikkor TC20E II 2.0x Teleconverter (EFL=600mm) on a Nikon D100 camera. (Date: April 7, 2006)