. Oiseaux : les éléments de l'ornithologie . un bel oiseau. Mais il y en a beaucoup encore plus beau, et le brillant et artificiellement marqué Mandarin Duck est particulièrement perceptible. De Swdns il n'y a que onze espèces, dont Rara avis de nos grammaires latins, le Cygne noir, isAustralian, tandis que le Cygne blanc à col noir, depuis l'Amérique du Sud, est une espèce remarquablement belle. Les Mergansers constituent un très petit groupe d'oiseaux aquatiques, nettement difEerent de ceux déjà mentionnés. i6 ÉLÉMENTS OP OElflTHOLOGY. À travers leurs notes étroites marginées avec des processus de type dent. ]ils ont

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. Birds: the elements of ornithology . a handsome Bird. But there are many yet handsomer, andthe brilliant and artificially-marked Mandarin Duck is especiallynoticeable. Of Swdns there are only some eleven species, whereofthat Rara avis of our Latin grammars, the Black Swan, isAustralian, while the White Swan with a black neck, fromSouth America, is a remarkably handsome species. The Mergansers constitute a very small group of WaterBirds, markedly difEerent from the before noted web-footed ones. i6 ELEMENTS OP OElflTHOLOGY. through their narrow bills margined with tooth-like processes. ]They are noted as great destroyers of fish. Of them, the _G-oosander (Mergus merganser) may be taken as a type—a birddear to the Scandinavian peasant. Mr. Seebohm tells * us that, as the House-martin has found a better shelter for its nest under .the eaves of a roof than in a cliff, so the Groosander immediately |avails itself of the wooden boxes which the Eins fasten up inthe trees to tempt them. These are made with a trap-door; Fig. 13.. The Groosander {Mergua merganser). behind so that the peasant may daily rob the nest, and thusmake the too-conflding bird lay a score or more of eggs before Jthe wary man thinks it prudent to cease his depredations, and ■allow the Goosander to sit upon the nest for fear of spoilingthe next years harvest. In a half-domesticated state, on the surface or margins of ourponds, by homely farmsteads or in pleasure-grounds, we often |find those small familiar Water-Birds known as Moor-benB * British Birds, vol. ili. p. 626. INTEODUCTIOIf. 17 (OalUnula ehloropus). We see thein sometimes swimmingalong, with a nodding motion of their heads, or feeding on aquaticinsects, larval dragonflies, and others; sometimes hunting forslugs or worms amongst the grass of our meadows, jerking uptheir tail at every step. Our Moor-hen is the only onefound in Europe, but also in Asia, Africa, and America, though not in Australia. There are some fifteen other speciesof the ge

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