. A history of British birds, indigenous and migratory: including their organization, habits, and relations; remarks on classification and nomenclature; an account of the principal organs of birds, and observations relative to practical ornithology .. . eather of January, 1838, several flocks of these PolishSwans were seen pursuing a southern course along the line ofour north-east coast, from Scotland to the mouth of theThames, and several specimens were obtained. The circum-stance of these flocks being seen, without any observable dif-ference in the specimens obtaiued, all of which were disti
. A history of British birds, indigenous and migratory: including their organization, habits, and relations; remarks on classification and nomenclature; an account of the principal organs of birds, and observations relative to practical ornithology .. . eather of January, 1838, several flocks of these PolishSwans were seen pursuing a southern course along the line ofour north-east coast, from Scotland to the mouth of theThames, and several specimens were obtained. The circum-stance of these flocks being seen, without any observable dif-ference in the specimens obtaiued, all of which were distinctfrom our Mute Swan; the fact also, that the Cygnets, as faras observed, were of a pure white colour, like the parent birds,and did not assume, at any age, the grey colour borne for thegreater part of the first two years by the young of the otherspecies of Swans ; and an anatomical distinction in the formof the cranium, which was described by Mr. Pelerin in theMagazine of Natural History, induced me to consider thisSwan entitled to rank as a distinct species, and, in referenceto the unchangeable colour of the plumage, I proposed for itthe name of Cygnus immutabilis. 659 CYGNUS MUSICUS. THE WHOOPING SWAN. HOOPER. WILD SWAN. WHISTLING SWAN. Fio. 59. Anas Cygnus ferus. Linn. Syst. Nat. I. 194. Anas Cygnus. Lath. Ind. Ornith. II. 833. Whistling or Wild Swan. Mont. Ornith. Diet, and Supplt. Cygne a bee jaune ou sauvage. Anas Cygnus. Temm. Man. dOrn. II. 828 Whistling Swan. Cygnus ferus. Selhy, Illustr. II. 278. Cygnus ferus. Whistling Swan. Jenyns, Brit. Vert. Anim. 227. Cygnus musicus. Bonap. Comp. List, 55. Adult male about sixty inches long, ninety-Jive in extent ofwings; bill from the joint to the tip of the upper mandiblethree inches and a half, its greatest width about the middle aninch and a quarter; from the eye to the tip of the bill five 660 CYGNUS MUSICUS. inches and two-twelfths; tarsus four inches and two-ticelfths;middle toe four inches and ten-twelfths, its cl
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