The Eurasian siskin /Spinus spinus
It is found in forested areas, both coniferous and mixed woodland where it feeds on seeds of all kinds, especially of alder and conifers.
These birds have an unusual migration pattern as every few years in winter they migrate southwards in large numbers. The reasons for this behaviour are not known but may be related to climatic factors and above all the availability of food.
The siskin is a small, short-tailed bird, 11–12.5 cm in length with a wingspan that ranges from 20–23 cm . It weighs between 10–18 g.