. Fig. 52. Cnemiodocoptes kevis, larva, ventral aspect, enlarged 200 times. (Railliet) feathers in fowls, pigeons and pheasants during the spring and summer. It infests the portion of the quill that lies beneath the surface of the skin. The affecr tion usually appears first on some spot on the body, and pro- gresses gTadually to the neck, thighs and head, or the head and neck may be affected first. The frequency with which the back is first affected suggests that treading may be the principal means of dissemination. The large feathers of the wing and tail are not generally involved. The feathe
. Fig. 52. Cnemiodocoptes kevis, larva, ventral aspect, enlarged 200 times. (Railliet) feathers in fowls, pigeons and pheasants during the spring and summer. It infests the portion of the quill that lies beneath the surface of the skin. The affecr tion usually appears first on some spot on the body, and pro- gresses gTadually to the neck, thighs and head, or the head and neck may be affected first. The frequency with which the back is first affected suggests that treading may be the principal means of dissemination. The large feathers of the wing and tail are not generally involved. The feathers are either shed entire, or the quills break off close to the level of the skin. Sometimes the stumps are (Sarcoptes) tracked and are surrounded bv epidermal scales
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Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, booksubjectpou
