[Length 6 in. Wingspan xx in.]

This female European Greenfinch was photographed at Titchwell RSPB Reserve, Norfolk, England, Great Britain. Photo taken with a Nikkor EDAF 300 f4.0 lens on Kodachrome 200 film. (Date: May 2002)

[Length 6 in. Wingspan xx in.]

This male European Greenfinch was photographed at Titchwell RSPB Reserve, Norfolk, England, Great Britain. Photo taken with a Nikkor EDAF 300 f4.0 lens on Kodachrome 200 film. (Date: May 2002)

[Length 5.25 in. Wingspan 9 in.]

This Common Redpoll was photographed on Attu Island in the Aleutian Islands, Alaska, USA. Photo taken with a Nikkor 300mm ED f4.5 lens on Ektachrome 200 film. (Date: May 1984)

[Length 5.25 in. Wingspan 9 in.]

This Common Redpoll was photographed on Attu Island in the Aleutian Islands, Alaska, USA. Photo taken with a Nikkor 300mm ED f4.5 lens on Ektachrome 200 film. (Date: May 1984)

[Length 4.75 in. Wingspan xx in.]

This Eurasian Siskin was photographed at Loch an Eilein, Inverdruie, Scotland, Great Britain. Photo taken with a Nikkor 300mm EDAF-S f4 lens (EFL=450mm) on a Nikon D100 camera. (Date: June 18, 2004)

[Length 4.75 in. Wingspan xx in.]

This Eurasian Siskin was photographed at Loch Lomond National Park, Loch Lomond, Scotland, Great Britain. Photo taken with a Nikkor 300mm EDAF-S f4 lens (EFL=450mm) on a Nikon D100 camera. (Date: May 21, 2004)

[Length 4.75 in. Wingspan xx in.]

This Eurasian Siskin was photographed at Loch an Eilein, Inverdruie, Scotland, Great Britain. Photo taken with a Nikkor 300mm EDAF-S f4 lens (EFL=450mm) on a Nikon D100 camera. (Date: June 18, 2004)

[Length 5 in. Wingspan 9 in.]

Pine Siskins are common birds of the foothills and mountains of Alaska, the western US, and southern Canada. They appear irruptively in the eastern US in winter depending on the availability of food. This one was photographed feeding on thistle seeds in a field along the central coast of California, USA. Photo taken with a 300mm f4.5 Nikkor ED lens on Kodachrome 64 film. (Date: November 1981)