[Length 16 in. Wingspan 40 in.]

This winter plumaged Black-headed Gull was photographed at a dock on Lake Geneva near Montreaux, Switzerland. Photo taken with a Nikkor 300mm ED f4.5 lens on Kodachrome 64 film. (Date: September 1984)

[Length 16 in. Wingspan 40 in.]

This Black-headed Gull was photographed at Loch of Funzie RSPB Reserve, Funzie, Fetlar, Shetland, Scotland, Great Britain. Photo taken with a Nikkor 300mm EDAF-S f4 lens (EFL=450mm) on a Nikon D100 camera. (Date: June 7, 2004)

[Length 16 in. Wingspan 40 in.]

This Black-headed Gull was photographed at Carrbridge, Scotland, Great Britain. Photo taken with a Nikkor 105mm EDAF-D f2.8 lens (EFL=157mm) on a Nikon D100 camera. (Date: June 20, 2004)

[Length 18.5 in. Wingspan 47.25 in.]

This Black-tailed Gull was photographed from a passenger ferry, Hokkaido, Japan. Photo taken with a Nikkor EDAF 300mm f4.0 lens on Kodachrome 200 film. (Date: January 1996)

[Length 13.5 in. Wingspan 33 in.]

Bonaparte's Gulls breed throughout much of Canada and Alaska. They winter along both coasts of North America. This one, in drab winter plumage, was photographed at Padre Island National Seashore, Texas, USA. Photo taken with a Nikkor 300mm ED f4.5 lens on Kodachrome 200. (Date: January 1989)

[Length 13.5 in. Wingspan 33 in.]

This winter plumaged Bonaparte's Gull was photographed flying over Potter Point Marsh near Anchorage, Alaska, USA. Photo taken with a Nikkor 300mm ED f4.5 lens on Kodachrome 200 film. (Date: April 1987)

[Length 13.5 in. Wingspan 33 in.]

This winter plumaged Bonaparte's Gull was photographed flying over Potter Point Marsh near Anchorage, Alaska, USA. Photo taken with a Nikkor 300mm ED f4.5 lens on Kodachrome 200 film. (Date: April 1987)

[Length 13.5 in. Wingspan 33 in.]

This breeding plumaged Bonaparte's Gull was photographed at the Cape May Meadows in New Jersey, USA. Photo taken with a Nikkor 300mm EDAF f4.0 lens on Kodachrome 200 film. (Date: April 1988)