The Eurasian Siskin (Carduelis spinus) is a small passerine bird in the finch family Fringillidae. It is very common throughout Europe and Asia. It is found in forested areas, both coniferous and mixed woodland where it feeds on seeds of all kinds, especially of alder and conifers. It is a trusting, sociable and active bird. The song of this bird is a pleasant mix of twitters and trills.
The Eurasian Siskin can be found across the greater part of Eurasia and the north of Africa. Its breeding area is separated into two zones, each side of the Palearctic ecozone: the east coast of Asia and the central and northern part of Europe. These birds can be found throughout the year in Central Europe and some mountain ranges in the south of the continent. They are present in the north of Scandinavia and in Russia and they over-winter in the Mediterranean basin and the area around the Black Sea. In China they breed in the Khingan Mountains of Inner Mongolia and in Jiangsu province; they spend summer in Tibet, Taiwan, the valleys of the lower Yangtse River and the south east coast. The Eurasian Siskin is occasionally seen in North America.
Source: en.wikipedia.org/wiki/Eurasian_Siskin - 06.10.2010
The male has – it is the same with many birds – with the Eurasian Siskin a little stronger colours than the female, moreover there are many tints within the species, too.