[Length 7.75 in. Wingspan 17 in.]

This Common Poor-will was photographed at Cave Creek Canyon, Arizona, USA. Photo taken (by flashlight!) with a Nikkor 300mm ED f4.5 lens on Ektachrome 200 film. (Date: May 1985)

[Length 14 in. Wingspan ?? in.]

This Common Potoo was photographed at Metropolitan Park, Panama City, Panama. Photo taken with a AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED lens (EFL=420mm) on a Nikon D300 camera. (Date: August 6, 2011)

[Length 7.25 in. Wingspan 18 in.]

This Black Swift on the nest was photographed at the waterfall at Box Canyon Park, Ouray, 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 27, 2016)

[Length 7.25 in. Wingspan 18 in.]

This Black Swift on the the nest was photographed at Box Canyon Park, Ouray, 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 28, 2016)

[Length 5.25 in. Wingspan 14 in.]

This Chimney Swift in flight was photographed in central New Jersey, USA. Photo taken with a Nikkor 300mm ED f4.5 lens on Kodachrome 200 film. (Date: May 1990)

[Length 6.5 in. Wingspan 15 in.]

This White-throated Swift was photographed in the foothills of the Rocky Mountains just west of Denver, Colorado, USA. Photo taken with a Nikkor 300mm ED f4.5 lens on Ektachrome 400 film pushed to 800. This photo is on file with the Academy of Natural Sciences' Visual Resources for Ornithology (VIREO B22/1/006). (Date: June 1986)