The beech marten (Latin Martes foina), also known as house marten, and white-breasted marten, is a species of marten. It is a carnivorous mammal with a wide distribution in Europe. It is a nocturnal species, although it can be active during the day. It can climb trees, walls, and fences easily, thanks to its claws, while its long tail helps it maintain its balance. It feeds mainly on rodents, birds, and more rarely on plants.