[Length 23 in. Wingspan 35 in.]

This female and her ducklings were photographed at Rocky Mountain National Park, Colorado, USA. Photo taken with a Nikkor 300mm ED f4.5 lens on Kodachrome 64 film. (Date: July 1980)

[Length 23 in. Wingspan 35 in.]

This drake Mallard was photographed on a lake in the foothills near Arroyo Grande, California, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: November 1997)

[Length 23 in. Wingspan 35 in.]

This female Mallard was photographed on a lake in the foothills near Arroyo Grande, California, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: April 1986)

[Length 23 in. Wingspan 35 in.]

This female Mallard was photographed at a park in Kerrville, Texas, USA. Photo taken with a Nikkor EDAF 180 f2.8 lens on Kodachrome 200 film. (Date: December 2001)

[Length 23 in. Wingspan 35 in.]

This female Mallard and creche of ducklings was photographed at St. James Park, London, England, Great Britain. Photo taken with a Nikkor EDAF 300 f4.0 lens on Kodak Elitechrome 200 film. (Date: April 2002)

[Length 23 in. Wingspan 35 in.]

This drake Mallard was photographed at Cley Marshes RSPB Reserve, Norfolk, England, Great Britain. Photo taken with a Nikkor EDAF 300 f4.0 lens on Kodak Elitechrome 200 film. (Date: May 2002)

[Length 23 in. Wingspan 35 in.]

This female Mallard was photographed at Cheyenne Bottoms, Kansas, USA. Photo taken with a Nikkor 300mm EDAF-S VR f2.8 lens + Nikkor TC20E II 2.0x Teleconverter (EFL=900mm) on a Nikon D200 camera. (Date: May 2, 2007)

[Length 23 in. Wingspan 35 in.]

This male Mallard was photographed at Cheyenne Bottoms, Kansas, USA. Photo taken with a Nikkor 300mm EDAF-S VR f2.8 lens + Nikkor TC20E II 2.0x Teleconverter (EFL=900mm) on a Nikon D200 camera. (Date: May 2, 2007)