THIS bird is always found on the sea-shore, or near rivers or lakes, as it feeds entirely on fish. It is common in Great Britain, and also in America, where large colonies of it are found, the birds living together like rooks. “When looking out for its prey,” says Dr. Richardson, “it sails with great ease and elegance, in undulating and curved lines, at a considerable height above the water, till it perceives its prey, when it pounces down upon it. It seizes the fish with its claws, sometimes scarcely appearing to dip its feet in the water, and at others plunging entirely under the surface with force sufficient to throw up a considerable spray. It emerges again, however, so speedily, as to render it evident that it does not attack fish swimming at any great depth.” The toes are armed beneath with numerous sharp points, evidently intended to assist the bird in getting a firm hold of its slippery prey. The Osprey builds a large nest either on trees or rocks, and lays two or three eggs, which have a reddish tinge, and are spotted with brown at the larger end. The old birds feed the young ones even after they have left the nest, and only rear one brood in the year. [Illustration: THE BLACK EAGLE.] SOME ornithologists suppose this to be merely the golden eagle in its young state, but others make it a distinct species. It is about twice as large as the raven. The parts about the beak and the eye are bare of feathers, and somewhat reddish; the head, neck, and breast black; in the middle of the back, between the shoulders, there is a large white spot, dashed with red; a black streak sweeps along the feathers, and is followed by a white one; the remaining part of the wing to the tip is of a dark ash-colour. This bird has beautiful hazel eyes, full of animation: his legs are feathered down a little below the tarsal joint, the naked part being red; his talons are very long. He is found in France, Germany, Poland, and delights in Alpine mountains, where he makes the vales and woods resound with his incessant screamings when in search of prey. The Abbé Spallanzani had an eagle of this species, so powerful as to be able to kill dogs that were much larger than itself. When a dog was placed before it, the bird would ruffle up the feathers on its head and neck, cast a dreadful look at its victim, take a short flight, and immediately alight on its back. It held the head firmly with one foot, and thus secured the dog from biting, and with the other grasped one of his flanks, at the same time driving its talons into the body; and in this attitude it continued, till the dog expired with fruitless outcries and efforts.