. The bird, its form and function . bserved in almost any young bird, beingmore noticeable in large species, which have very thick 26 The Bird or lengthened down, as gulls and ducks. A Red-wingedBlackbird, or for that matter almost any passerine nest-ling, looks very odd when it rises up in the nest, gaping forfood; the long gray streamers of down waving like anaureole around its head. In some water-birds this nest-ling down retains its usefulness for nearly two months. Fig. 13.—Feather from the head of a young Bobolink, with down still attachedto its tip. Twice natural size. The feathers whic
. The bird, its form and function . bserved in almost any young bird, beingmore noticeable in large species, which have very thick 26 The Bird or lengthened down, as gulls and ducks. A Red-wingedBlackbird, or for that matter almost any passerine nest-ling, looks very odd when it rises up in the nest, gaping forfood; the long gray streamers of down waving like anaureole around its head. In some water-birds this nest-ling down retains its usefulness for nearly two months. Fig. 13.—Feather from the head of a young Bobolink, with down still attachedto its tip. Twice natural size. The feathers which replace the down are, when theyfirst appear above the skin, rolled tightly and bound upin the thin tissue of the horny sheaths, so that theyresemble a bundle of withes wrapped together in a many young birds the feathers remain in this condi-tion until they are nearly full grown, and a young cuckoo Feathers 27 or kingfisher is a curious-looking object, most of thebirds body seeming to be tiled with small, bluish Fig. 14.—Tip of feather from the crown of a young Song Sparrow, showingconnection with down. Magnified 25 diameters.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1906
