Martes foina  

The beech marten is a medium-sized mutelid which has brown fur (with a white a patch in the neck) and very wide geographical range. It looks alike the european pine marten, but the two species can be differentiated through many characteristics (see "diagnostic description" for more details). It measures 38-59 cm in body length, 23-32 cm in tail length and 1.1-2.1 kg in body mass. The males are larger and heavier than the females. The body mas is lowerin winter due to the lack of food resources. 

It breeds in June-July and the gestation lasts about 6-7 months. The juveniles reach sexual maturity at 15-27 months. The lifespan is about 10 years in the wild and 18 years in captivity.