. British birds . Fias. 2, 3. (After Wray in Ibis for 1887.) B, Barbs; bp, proximal barbules; 1, flange; 2, dog-tooth, partol flaage;8, orerlapping Fio. 4.—Portion of two adjacent Baebs. (After Wray in * Ibis for , barbs; bd^ bp, barbules (distal and proximal). 6 BRITISH BIBDS which have this, elaborate structure are not found at all in theostrich-like birds; in them there is no need for a firm s:face tocatch the air; on the contrary, it would be, if anything, disadvantage-ous to swift runners, as those birds are. The feathers, therefore, aremuch reduced in complexity, and in s
. British birds . Fias. 2, 3. (After Wray in Ibis for 1887.) B, Barbs; bp, proximal barbules; 1, flange; 2, dog-tooth, partol flaage;8, orerlapping Fio. 4.—Portion of two adjacent Baebs. (After Wray in * Ibis for , barbs; bd^ bp, barbules (distal and proximal). 6 BRITISH BIBDS which have this, elaborate structure are not found at all in theostrich-like birds; in them there is no need for a firm s:face tocatch the air; on the contrary, it would be, if anything, disadvantage-ous to swift runners, as those birds are. The feathers, therefore, aremuch reduced in complexity, and in some they consist only of thestem and the barbs. Even in flying birds there are plenty of feathersof a simple structure lying between the stronger contour are the soft feathers which are generally spoken of as * of them are so reduced as to consist of little more than thestem. The same reduction is seen in the wing feathers of theCassowary. Along the margin of the wing are a few strong blackspines, which are really the quills of the wing feathers with no barbsat all; they consist merely of the stem, which has not dwindled i
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Keywords: ., bookauthorhudsonwh, bookcentury1900, bookdecade1920, bookyear1921
