[Length 60 in. Wingspan 91 in.]

These Whooper Swans were photographed at Hokkaido, Japan. Photo taken with a Nikkor EDAF 300 f4.0 lens on Kodachrome 200 film. (Date: January 1996)

[Length 60 in. Wingspan 91 in.]

This Whooper Swan was photographed at Hokkaido, Japan. Photo taken with a Nikkor EDAF 300 f4.0 lens on Kodachrome 200 film. (Date: January 1996)

[Length 60 in. Wingspan 91 in.]

These two juvenile Whooper Swans, part of a large flock of adults, were photographed at Hokkaido, Japan. Photo taken with a Nikkor EDAF 300 f4.0 lens on Kodachrome 200 film. (Date: January 1996)

[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)