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abdomen and crissum acquired by wear Adult Nuptial Plumage Adult Winter Plumage auriculars becoming practically indistinguishable Bill and feet body plumage breast brown browner brownish buffy chestnut cinnamon color complete post complete postnatal moult crown darker dull black dull white duller Egerkingen Eocene fauna feathers feet pinkish buff female Female.—The plumages Female.—The sexes flanks grayer grayish greater coverts greenish including sides involves the body Juvenal Plumage acquired lores male Miocene 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 170 - 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 276 - A partial postjuvenal molt, involving all the contour plumage and the wing coverts, but not the rest of the wings or the tail, occurs in July and August.
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 345 - Observations on the laws which appear to influence the assumption and changes of plumage in birds Trans.
Page 343 - ... Brazilian Expedition, No. I, from Rio de Janeiro to Porto Alegre, by HS Smith. — Unnatural attachments among animals, by JD Caton. — Butterfly hunting in the desert, by WG Wright —The extinct Rodentia of North America, by ED Cope.
Page 272 - ... differs little from the first winter dress, but of richer brown above with darker wing edgings, the chestnut more abundant on the crown and the streakings below more conspicuous." Adults have a partial prenuptial molt in the spring, as in the young birds. Of the females he says : "The sexes are very similar in all plumages, females usually a little browner and with less yellow. In first "winter plumage with very little or no chestnut on the crown and later practically indistinguishable, but undergoing...
Page 232 - Above, including sides of head and wing coverts, olive-brown. Below, paler with darker broad fused stripes on the throat, breast, sides and flanks, the chin paler, the abdomen and crissum dull white often yellow or buff tinged. A crest not well marked is found on the crown. Anterior frontal feathers, lores and partial orbital ring dull black ; posterior quadrant of orbital ring, submalar streak and narrow superciliary line white or pale buff. Chin bordered laterally by dull black. Wings and tail...
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.