Ingo Arndt / Beech marten in snow {Martes foina} Germany

Laurent Geslin / Beech marten (Martes foina) at night in city, Switzerland, taken using infra red beam

Dietmar Nill / Two Beech / Stone martens {Martes foina} interacting, Germany.

Bruno D'Amicis / Pine marten (Martes martes) in old-growth Beech (Fagus sylvatica) forest, UNESCO World Heritage Site. Abruzzo, Lazio and Molise National Park, Italy. June.

Ashley Cooper / Beech marten, (Martes foina) killed on a road on Lesvos, Greece. June.

Ashley Cooper / Beech marten, (Martes foina) killed on a road on Lesvos, Greece. June.

Philippe Clement / Beech marten, (Martes foina) looking around in barn, Germany, May. Captive.

Philippe Clement / Beech marten (Martes foina) foraging on beams in ceiling of attic, Germany, captive

Nick Upton / Catherine McNicol radiotracking in mixed Beech and coniferous woodland to locate radio-collared Grey Squirrels (Sciurus carolinensis) in the area where their predators, Pine Martens (Martes martes) ha...

Nick Upton / Catherine McNicol radiotracking in mixed Beech and coniferous woodland to locate radio-collared Grey Squirrels (Sciurus carolinensis) in the area where their predators, Pine Martens (Martes martes) ha...

Ingo Arndt / Beech marten in snow {Martes foina} Hessen, Germany

Sylvain Cordier / Beech marten (Martes foina) climbing in barn, Alsace, France