...Unlike most other birds, Swans and Ducks lose the whole oftheir wing feathers at once when moulting, so that for a shorttime they cannot fly... 
John Albert Leach 「An Australian Bird Book」
...It is as if the warmer, lighterclouds of sunny weather were nestling close to earth,frightened from the skies, like a flock of white swans,at the October howls of winter...
W. E. Webb 「Buffalo Land」
...Naturalists divide swans into a number of different species...
John H. Robinson 「Our Domestic Birds」
...The habits of swans, and thecircumstances under which they are usually kept, tend to prevent themingling of different kinds...
John H. Robinson 「Our Domestic Birds」
...Theterms "cock" and "hen" are sometimes applied to swans as they are tomany other kinds of birds...
John H. Robinson 「Our Domestic Birds」
...Most of the swans in America are kept inpublic parks or on large private estates...
John H. Robinson 「Our Domestic Birds」
...A pair of swans would cost about the same as agood cow, and might make about the same net profit...
John H. Robinson 「Our Domestic Birds」
...Even whennatural food is abundant, it is a good plan to feed swans a little ofsomething else occasionally, to attach them to the person who has chargeof them...
John H. Robinson 「Our Domestic Birds」
...As every one knows who has seen the swans in parks, wherevisitors amuse themselves by feeding them, swans are very fond of bread...
John H. Robinson 「Our Domestic Birds」
...In severe winters, flocks of Whoopers, Whistling Swans, or Elks,as they are variously called, come farther south, and may beobserved from time to time on different parts of the coast...
Rev. C. A. Johns 「British Birds in their Haunts」
...As long as there wereblack sheep in the world, I don’tsee why there shouldn’t havebeen Black Swans, do you?...
Various 「Birds Illustrated by Color Photography [February, 1898]」
...Two of the Swans hetook alive to Dutchland andeverybody was greatly surprised...
Various 「Birds Illustrated by Color Photography [February, 1898]」
...Where the muskrat (Fiber zibethicus) abounds, his dome-shaped dwelling—at that season, of course, deserted—serves often as the breeding-place boll? for the swans and wild geese...
Mayne Reid 「The Hunters' Feast」
...The fences or wattle-hedges are always constructed projecting out from the shore—for it is known that the swans must keep close in to the land while feeding...
Mayne Reid 「The Hunters' Feast」
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