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abdomen and crissum acquired by wear ADULT NUPTIAL PLUMAGE ADULT WINTER PLUMAGE Amer auriculars become practically indistinguishable Bill and feet body plumage breast brown browner brownish chestnut cinnamon color complete post complete postnatal moult crown darker dull black dull white duller Eocene fauna feathers feet pinkish buff female Female.—The plumages Female.—The sexes flanks grayer grayish greater coverts greenish involves the body JUVENAL PLUMAGE acquired lores male Miocene moult in July moult which involves moults correspond mouse-gray NATAL nuptial moult NUPTIAL PLUMAGE acquired old becoming practically Oligocene olive-gray olive-green orbital ring paler partial postjuvenal moult partial prenuptial moult Passerine Pikermi pileum Pleistocene Pliocene plumages and moults previous plumage primary coverts rectrices remiges rump sepia-brown sides of head species specimen seen spots streaked superciliary line tinged tipped tracts veiled whitish wing bands wing coverts wings and tail winter dress WINTER PLUMAGE acquired wood-brown worn yellow Young and old young bird
Page 285 - First winter plumage acquired by a partial postjuvenal moult in July and August in eastern Canada, which involves the body plumage and the wing coverts, but not the rest of the wings and the tail.
Page 57 - Hyracoidea, certain cdentata, the antelopes, the giraffes, the hippopotami, the most specialized ruminants, and among the rodents, the anomalures, dormice, and jerboas, among monkeys the baboons, may all have enjoyed their original adaptative radiation in Africa ; that they survived after the glacial period, only in the Oriental or Indo-Malayan region, and that this accounts for the marked community of fauna between this region and the Ethiopian as observed by BLANFORD and ALLEN.
Page 259 - acquired by a partial postjuvenal moult in July which involves the body plumage, tertiaries and wing coverts, but not the rest of the wings nor the tail.
Page 188 - He says that the first winter plumage is "acquired by a partial postjuvenal moult beginning the end of June which involves the body plumage and the wing coverts but not the rest of the wings nor the tail.
Page 49 - II. ADAPTIVE RADIATION of ORDERS AND FAMILIES AS BEARING ON GEOGRAPHICAL DISTRIBUTION. This law causes the independent origin not only of similar genera but of similar families and even of similar orders. Nature thus repeats herself on a vast scale, but the similarity is never complete or exact. When migrations are favored by over-population or geographical changes, a new and severe test of fitness arises by the mingling and competition of the parallel types. Under the operation of these laws a most...
Page 325 - Observations on the various seasonal and other external changes which regularly take place in birds, more particularly in those which occur in Britain ; with remarks on their great importance in indicating the true affinities of species ; and upon the natural system of arrangement London's Mag.
Page 276 - The first winter plumage is acquired by a partial postjuvenal molt in August and September "which involves the body plumage, the wing coverts (often the tertiaries) but not the rest of the wings nor the tail.
Page 325 - On the Reconciliation of certain apparent Discrepancies observable in the mode in which the seasonal and progressive Changes of Colour are effected in the Fur of Mammalians and Feathers of Birds ; with various Observations on Moulting.
Page 71 - Skeleton of Teleoceras fossiger. Notes upon the Growth and Sexual Characters of this Species. Ball. Ämeric. Museum of Natural History. Vol. X. Article IV. March, 1898. — — A Complete Skeleton of Coryphodon radians. Notes upon the Locomotion of this Animal. Ebendaselbst. Article VI.
Page 48 - Now it is a well-known principle of zoological evolution that an isolated region, if large and sufficiently varied in its topography, soil, climate, and vegetation, will give rise to a diversified fauna according to the law of adaptive radiation from primitive and central types.