. Schlüssel zu nordamerikanischen Vögeln. Mit einer kurzen Darstellung aller Arten von lebenden und fossilen Vögeln, die derzeit vom Kontinent nördlich der mexikanischen und US-amerikanischen Grenze bekannt sind, einschließlich Grönland und Niederkalifornien, mit denen die allgemeine Ornithologie integriert ist: Eine Übersicht über die Struktur und Klassifizierung von Vögeln; Und Feldornithologie, ein Handbuch zum Sammeln, Vorbereiten und Konservieren von Vögeln. Aphy in Tlie Jurassic Periode, graviert von Archceopteryx Htlmfiraphwa. Von der Originalplatte im British Museum; nach A. Newton, Ency. Brit. Geologische Abfolge von Vögeln. - Vögel
1418 x 1762 px | 24 x 29,8 cm | 9,5 x 11,7 inches | 150dpi
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. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and Lower California, with which are incorporated general ornithology: an outline of the structure and classification of birds; and field ornithology, a manual of collecting, preparing, and preserving birds . aphy in tlie Jurassic period, engraved by Archceopteryx Htlmfiraphwa. From the originalslab in the British Museum; after A. Newton, Ency. Brit. Geologic Succession of Birds. — Birds have been traced back in geologictime to Cretaceous and Jurassic epochsof the Mesozoic or Mid-Life period ofthe worlds history. The earliest ornith- DEFINITION OF BIEDS. 63 ichnites, — the fossils so called ))ecause supposed to indicate the presence of Birds by theirfoot-pririts, were discovered about the year 1835 in the Triassic formation in Connecticut.But the creatures which made these trades are now reasonably believed to have been allDinosaurian Reptiles. The oldest ornitholUe, or fossil certainly known to be that of a trueBird, is the famous ArchcBopteryx, found by Andreas AVaguer in 1861 in the Oolitic slate ofSolenhofen in Bavaria. This has a long lizard-like tail of twenty vertebrte, from each of whichsprings a weU-developed feather on each side ; feathers of the wings are also well preserved;. Fig. 15.—Restoration of Hesperornis regalis. After Marsh. bones of the hand are not fused together, as they are in recent Birds ; and the jaws bear trueteeth. This Bird has served as the basis of one of the primary divisions of the class Aves;though it has many reptilian characters, it is a true Bird. The great gap between this ancientAvian and latter-day birds has been to some extent bridged by Marshs discovery and splendidrestoration of Birds from the Cretaceous formations of North America, suoli genera asIchfhyornis and Hesperornis forming types of two other primary d
