286. Cygnus olor.
THE MUTE SWAN.
(The "Tame Swan" of Europe.)
Olor— a. Swan, in classical Latin, especially in poetry. Perhaps a Spanish word. Of. Welsh alarch.
Penr, Punjab; Koday, Yarkand.
Male 55 1/2" to 60"; 15 lbs. Female 53"; 13 lbs. Legs black. Bill, lower mandible black, upper mandible red-orange, with lores, tubercle, base, nostrils, nail, and edges black. Plumage white, with cream or buff tinge. Tail comparatively long and wedge-shaped. Remiges thirty-one.— Female: Similar, but smaller, with smaller frontal tubercle. Sits on eggs for six weeks.— Young, sooty grey, do not acquire full plumage till second year. Europe, N. and C. Asia. An occasional visitor to N.W. India and Sind. Nest of dead reeds and grass 2 feet high and 5 feet across. Five to eleven eggs ( 4 1/2 x 3), greenish white. Hybrids with C. musicus and G. atratus. (B. 1577. H. & M. iii. 41.)
Also C. immutabilis. The Polish Swan, the wild variety of C. olor, but legs are ashy grey, and tubercle is less developed. Generally regarded as a quasi albino produced by domestication. None of the characters attributed to this bird are constant. Hybrids with B. leucopsis, the Barnacle Goose, and B. canadensis.
C. melancoryphus. 48". The Black-necked Swan. Legs flesh colour. Bill leaden, base and knob red. Plumage white, with head and upper-neck black. Narrow white eye-ring. S. America.
With no protuberance on bill.