Estrus and copulation occur at the same time as in the pine marten. Pantalaimon has settled into the form of a pine marten. The species is sometimes referred to as simply the pine marten. The European pine marten also inhabits the island. The tail is dark-brown, while the back is darker than that of the pine marten. The accompanying lodge at the top of Pine Marten was built two years later. The European pine marten inhabits well-wooded areas. The European pine marten and marbled polecat are uncommon in Strandzha. Unlike the pine marten, its underfur is whitish, rather than greyish. Other species found in the park include foxes, badgers, and the European pine marten. Its most likely ancestor is "Martes vetus", which also gave rise to the pine marten. Pine marten is another notable species in the park. The European pine marten ("Martes martes") is a mustelid native to Northern Europe. Mammals include badger, fox, pine marten, red deer, sika deer, and red squirrel. The diet of the pine marten includes small mammals, carrion, birds, insects, and fruits.