. The structure and life of birds. Birds; Evolution. 384 THE STRUCTURE AND LIFE OF BIRDS chap. present; the relation of the branched tendon that flexes the toes to that which flexes the hallux (see p. 167); the presence or absence of the ambiens muscle (see p. 169) which passes from the pelvis to the toes ; the distribution of the feathers on the neck and back —whether there is a clearly defined tract of feathers on the neck with bare spaces or apteria on either side, and whether this tract forks, an apterion dividing it. Fig. 76.—(a)—after Nitzsch—Snipe, spinal feather tract divided ; (b) Bla
. The structure and life of birds. Birds; Evolution. 384 THE STRUCTURE AND LIFE OF BIRDS chap. present; the relation of the branched tendon that flexes the toes to that which flexes the hallux (see p. 167); the presence or absence of the ambiens muscle (see p. 169) which passes from the pelvis to the toes ; the distribution of the feathers on the neck and back —whether there is a clearly defined tract of feathers on the neck with bare spaces or apteria on either side, and whether this tract forks, an apterion dividing it. Fig. 76.—(a)—after Nitzsch—Snipe, spinal feather tract divided ; (b) Black- birtl, tract undivided. into two arms, when it reaches the back; whether there is an oil gland at the root of the tail, and whether this, if present, is bare or tufted with feathers ; whether the young are helpless when born, whether they are born naked or covered with down, and, if naked, whether they pass through a down-stage before their feathers grow; whether the hinder part of the Ster- num is entire or has notches or apertures ; what is the number of feathers in the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Headley, F. W. (Frederick Webb), 1856-1919. London, New York, Macmillan
Size: 1630px × 1533px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1895
