The Otter (_fig. 65._) is a voracious animal, but more fond of fish than flesh, and is seldom found but at the sides of lakes and rivers. He swims with more facility than the beaver, who has membranes on his hind feet only, and whose toes on the fore feet are separate, whereas the otter has membranes on all his feet; and he can scarcely walk faster than he swims. He never ventures to the sea like the beaver, but swims up and down the rivers to considerable distances. Although he can remain a long time under water be cannot be properly called an amphibious animal; viz. one equally capable of living in air or in water; his conformation is not calculated for his living in the latter element, and he requires to breathe as much as any terrestrial animal. If they happen to be entangled in a net while pursuing a fish they drown, and this evidently for want of time to destroy a sufficient quantity of the meshes to effect their escape. His teeth are like those of the polecat, though larger and stronger in proportion to its size. For want of fish, frogs, water-rats, or other food, he will eat the young branches and bark of aquatic trees; and in the spring he will eat the young grass. He is as little afraid of cold as moisture. It couples in winter and brings forth in March, and commonly three or four at a time. In general young animals are pretty; but the young otters are not so handsome as the old: from the awkwardness of its motions deformity of figure, and a kind of mechanical cry, which it repeats almost without intermission, one should suspect it a stupid animal. He, however, becomes industrious with age, at least sufficiently so to wage a successful war with the fishes, who with respect to instinct and sentiment, are greatly inferior to other animals; and yet I can scarcely believe he has, I will not say the talents, but the habitudes of the beaver, such as always going up against the stream, in order to return more easily down the current when loaded with his prey; that of fitting up his house, and lining it with boards to exclude the water; that of laying in a quantity of fish against a future scarcity; and lastly, that of his being rendered so tame and subservient as to fish for his master, and even taking his booty into the very kitchen. All I know is, that the otter does not dig his own habitation, that he fixes his residence in the first hole he finds, under the roots of poplars or willows, in the clefts of rocks, and even among piles of floating wood; and in those they bring forth their young; where we also find heads and bones of fishes; that they frequently change their residence; that they drive away their young at the end of six weeks or two months; that those I attempted to tame endeavoured to bite, though then feeding on milk, and unable to chew fish; that a few days after they became more mild, probably from having become sick and weak; that so far from being easily habituated to a domestic life, all those that I endeavoured to