"Otters have a skin flap that forms a pocket so they can keep their favorite rock with them. They use this rock to break open mollusks when eating. Some otters go their entire lives carrying the same rock!” source
Harvest mice are Europe’s smallest rodents. It is easily identified with its blunt nose, short, rounded hairy ears and golden-brown fur. It posses a remarkable prehensile tail, which is used as a fifth limb that aids climbing through the tall, dense vegetation of their meadow, hedgerow and crop field homes.