. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 374 Bulletin 258. Time and sequence of the mature molt. The first mature molt comes at the end of the first year of laying. It seems to be a necessary renewal of the worn-out plumage. Feathers, like clothes, wear out (Fig. 11). In the mature molt, it was found that the rotation followed closely that of the pre-nuptial* molt before egg production commenced,—the oldest feathers being shed first. The mature molt seldom began
. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 374 Bulletin 258. Time and sequence of the mature molt. The first mature molt comes at the end of the first year of laying. It seems to be a necessary renewal of the worn-out plumage. Feathers, like clothes, wear out (Fig. 11). In the mature molt, it was found that the rotation followed closely that of the pre-nuptial* molt before egg production commenced,—the oldest feathers being shed first. The mature molt seldom began while the hen was laying. Quite a few feathers might be shed earlier in the season, and during production; but, in most cases, the shedding of feath- ers ceased for a week or two,— often for a much longer period, then the entire plumage was renewed. For convenience, this latter part of the molt is termed the " general ; During this molt, some hens shed only a few feathers at a time in the different feather tracts, looking well clothed throughout the molt, while others shed almost the entire plumage at once. This quick shedding gave a good oppor- tunity to observe the feather tracts on a hen (Cover cut and Fig. 12). The flight coverts, (the small, stiff feathers on the finger of the wing), often persisted long after the other plumage was molted. These feathers, which had been colored, were observed on several hens as late as April following the molt, and were then apparently as firmly fixed as ever. PART II. AN ATTEMPT TO FORCE THE MOLT. On August 11, 1906, we arranged 232 Single Comb White Leghorn fowls in six pens for the molting experiment. The details of housing, feeding and management may be stated, in order that the reader may have a complete mental picture Dt the Fig. 10.—Completely plumed with chick feathers a/ 54 days. * Dwight—"Sequence in Plumage of Passerine ;. Please note that these images are extracted from scann
Size: 1762px × 1419px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcollectionbiodiversity, bookcollectionnybotanicalgarden
