The family of divers (Colymbidæ) consists of four species, all contained in one genus; and of the four, three are British. In habits, as well as in structure, they are so closely related that a very brief description of the other two is all that will be necessary. The black-throated diver (_Colymbus arcticus_) is much smaller than the great northern diver, its length being twenty-six inches. Bill black; irides red; crown and hind head ash-grey; upper parts blackish, spotted and barred with white; throat purplish black, with a half-collar of short white streaks; sides of neck striped with black and white; under parts white. This diver breeds in small numbers on the west coast of Scotland and in the Outer Hebrides. To other parts of the country it is an accidental visitor. It is less oceanic in its habits than the last species described, and goes to a greater distance from the sea to breed. Two eggs are laid, similar in colour to those of the great northern diver. The red-throated diver (_Colymbus septentrionalis_) is the smallest of the three species, its length being twenty-three inches. It has the head, throat, and sides of the neck mouse-colour; crown spotted with black; neck marked with black and white lines; on the front of the neck a large orange-coloured patch; back dusky brown; under parts white. This species breeds in the west and north of Scotland, and in the Hebrides, Orkneys, and Shetlands. Great Crested Grebe. Podiceps cristatus. [Illustration: FIG. 116.--GREAT CRESTED GREBE. ¹⁄₁₀ natural size.] Crown and crest and ruff dark brown and chestnut; cheeks white; upper parts dark brown; secondaries white; under parts silky white. Length, twenty-two inches. * * * * * The great crested grebe still survives as a British species, although it is a large and handsome bird, and, like all those to which such a description applies, it has been much persecuted. Among our large water-birds there are few more strikingly handsome and stately in appearance than this grebe in its full breeding-plumage, when viewed as it floats, unalarmed, on the secluded reed-fringed water it loves. The swan, in its immaculate white dress, with proudly arched neck and plume-like scapulars, when seen ‘floating double,’ is to many minds the most perfect type of a beautiful waterfowl; certainly it is the most familiar. The great grebe has a very different appearance, with its straight neck, long, boat-shaped body, dark upper and silvery under plumage, and its broad ruff and double, ear-like crest; but in some aspects he is not less attractive than the white, larger bird, especially when sailing peacefully in close proximity to tall, slender reeds, their beauty, and that of the bird, enhanced by the ‘magic of reflection,’ when both seem part of the glassy pool, and made for one another.