Although a varied group, most mustelids are nocturnal, are good hunters and have long and agile bodies, short legs and thick fur. The water -loving otter is the only amphibious member of the family and is one of the largest European mustelids. Distribution Though under serious threat in much of its range, the Eurasian Otter is found across Europe, in North Africa and most of Asia. The Scottish population flourishes in the highlands and islands, in both marine and freshwater environments. Spraints' or piles of droppings mark their territory.
Otters create 'runs' - frequently used pathways with spraints deposited at various points.
The diet of an otter depends on its location, but they eat about 1kg of food each day. All Eurasian otters prey mainly on fish including eels, trout or blenny, but they also hunt crayfish, frogs and birds. Fish are caught underwater in the otter's strong jaws. Manual dexterity and stiff whiskers sensitive to water movement by prey are also important for hunting. Adaptations With water-repellent fur, hydrodynamic body, webbed paws and strong thick tail, the otter is perfectly designed for energetic and agile swimming.