[Length 5.5 in. Wingspan 13.5 in.]

This Cliff Swallow at its nest was photographed in Denali National Park, Alaska. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: June 1989)

[Length 5.5 in. Wingspan 13.5 in.]

These Cliff Swallow nests werre photographed at Candelaria, TX. Photo taken with a Nikkor EDAF 300 f4.0 lens on Kodachrome 200 film. (Date: June 2000)

[Length 5.5 in. Wingspan 13.5 in.]

This Cliff Swallow was photographed at Cimarron National Grasslands, Kansas. Photo taken with a Nikkor 70-200mm EDAF-S VR f2.8 lens (EFL=300mm) on a Nikon D200 camera. (Date: May 9, 2006)

[Length 5.5 in. Wingspan 13.5 in.]

These Cliff Swallow nests were photographed at the Hot Springs, Big Bend National Park, Texas. 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: December 12, 2010)

[Length 5.5 in. Wingspan 14 in.]

This Northern Rough-winged Swallow was photographed along the Rio Grande River near McAllen, Texas. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: April 2000)

[Length 5.75 in. Wingspan 14.5 in.]

This Tree Swallow was photographed at a Wildlife Management Area along the coast of Delaware. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: June 1991)

[Length 5.75 in. Wingspan 14.5 in.]

This whimsical portrait of a Tree Swallow was photographed at Brigantine NWR, New Jersey. Photo taken with a Celestron 750mm f5.6 mirror lens on Ektachrome 200 film. (Date: April 1976)

[Length 5.75 in. Wingspan 14.5 in.]

This adult Tree Swallow was photographed at Brigantine NWR, New Jersey. Photo taken with a Celestron 750mm f5.6 mirror lens on Ektachrome 200 film. (Date: April 1976)