[Length 19 in. Wingspan 51 in.]

The Swainson's Hawk is a common bird of the Great Plains and prairies of the central US and southern Canada. The distinctive light and dark underwing pattern makes this bird easy to identify, even at great distances. This one was photographed along a farm road on the plains east of Denver, Colorado. Photo taken with a 300mm f4.5 Nikkor ED lens on Kodachrome 64 film. (Date: July 1980)

[Length 19 in. Wingspan 51 in.]

This Swainson's Hawk was photographed at Arapaho NWR in Walden, Colorado. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: June 1986)

[Length 20 in. Wingspan 51 in.]

This White-tailed Hawk was photographed at Padre Island National Seashore in Corpus Christi, Texas. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodak Elitechrome 200 film. (Date: February 2001)

[Length 20 in. Wingspan 51 in.]

This immature White-tailed Hawk was photographed at an RV park near Bentsen Rio Grande State Park, Mission, Texas. Photo taken with a AF-S VR Nikkor 300mm f/2.8G IF-ED lens (EFL=450mm) on a Nikon D300 camera. (Date: January 6, 2011)

[Length 20 in. Wingspan 51 in.]

This White-tailed Hawk was photographed along Route 77 south of Sarita, Texas. Photo taken with a Nikkor 300mm ED f4.5 lens on Ektachrome 200 film. (Date: January 1988)

[Length 20 in. Wingspan 51 in.]

This White-tailed Hawk in flight was photographed along Route 77 south of Sarita, Texas. Photo taken with a Nikkor 300mm ED f4.5 lens on Ektachrome 200 film. (Date: January 1988)

[Length 20 in. Wingspan 51 in.]

This immature White-tailed Hawk was photographed along Route 77 south of Sarita, Texas. Photo taken with a Nikkor 300mm ED f4.5 lens on Ektachrome 200 film. (Date: January 1988)

[Length 20 in. Wingspan 51 in.]

This White-tailed Hawk in flight was photographed at Padre Island National Seashore, TX. Photo taken with a Nikkor EDAF 300 f4.0 lens on Kodak Elitechrome 200 film. (Date: February 2001)