[Length 21 in. Wingspan 54 in.]

This California Gull was photographed at Antelope Island State Park, Ogden, Utah, 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 20, 2016)

[Length 21 in. Wingspan 54 in.]

This California Gull was photographed at a small park in southern New York, USA. Photo taken with a Nikkor 300mm ED f4.5 lens on Kodachrome 64 film. (Date: November 1979)

[Length 16 in. Wingspan 43 in.]

This Common Gull was photographed at Sand, Mainland, Shetland, Scotland, Great Britain. Photo taken with a Nikkor 300mm EDAF-S f4 lens (EFL=450mm) on a Nikon D100 camera. (Date: June 1, 2004)

[Length 16 in. Wingspan 43 in.]

This Common Gull was photographed at the Shinnecock Inlet, Shinnecock, New York. Photo equipment unknown. (Date: Unknown)

[Length 16 in. Wingspan 43 in.]

This Common Gull was photographed at Baltasound, Unst, Shetland, Scotland, Great Britain. Photo taken with a Nikkor 300mm EDAF-S f4 lens (EFL=450mm) on a Nikon D100 camera. (Date: June 6, 2004)

[Length 16 in. Wingspan 43 in.]

This Common Gull was photographed at the Shinnecock Inlet, Shinnecock, New York. Photo equipment unknown. (Date: Unknown)

[Length 25 in. Wingspan 58 in.]

This Herring Gull was photographed at Baltasound, Unst, Shetland, Scotland, Great Britain. Photo taken with a Nikkor 300mm EDAF-S f4 lens (EFL=450mm) on a Nikon D100 camera. (Date: June 6, 2004)

[Length 25 in. Wingspan 58 in.]

This Herring Gull was photographed at Baltasound, Unst, Shetland, Scotland, Great Britain. Photo taken with a Nikkor 105mm EDAF-D f2.8 lens (EFL=157mm) on a Nikon D100 camera. (Date: June 6, 2004)

[Length 14.5 in. Wingspan 36 in.]

This Franklin's Gull was photographed at Rollover Pass, Bolivar Peninsula, Texas, USA. Photo taken with a AF-S VR Nikkor 300mm f/2.8G IF-ED lens + Nikkor TC17E II 1.7x Teleconverter (EFL=750mm) on a Nikon D300 camera. (Date: April 23, 2010)