The Osprey: An Illustrated Monthly Magazine of Popular Ornithology, Volumen 5

Portada
Osprey Company, 1901
 

Comentarios de usuarios - Escribir una reseña

No hemos encontrado ninguna reseña en los sitios habituales.

Otras ediciones - Ver todo

Términos y frases comunes

Pasajes populares

Página 31 - Dr. G. Brown Goode, Assistant Secretary of the Smithsonian Institution...
Página 32 - RIDER AGENTS WANTED one in each town to ride and exhibit a sample 1901 model bicycle of our manufacture. YOU CAN MAKE $10 TO $50 A WEEK besides having a wheel to ride for yourself. 1901 Models...
Página 31 - The question of what constitutes a "family" or a "genus" being involved, and, moreover, one concerning which there is much difference of opinion among systematists, the author's views may be stated, in order to make clear the principles which have been his guide in the present work. Accepting evolution as an established fact — and it is difficult to understand how anyone who has studied the subject seriously can by any possibility believe otherwise — there are no "hard and fast lines," no gaps,...
Página 9 - ... it is easily distinguishable from all other hawks by the eye of an observer, accustomed to note the flight of birds. Whilst in search of food, it flies with easy flappings at a moderate height above the water, and with an apparent listlessness, although in reality it is keenly observing the objects beneath. No sooner does it spy a fish suited to its taste, than it checks its course with a sudden shake of its wings and tail, which gives it the appearance of being poised in the air for a moment,...
Página 31 - ... future progress may be more rapid. In the following pages the attempt is made to describe every species and subspecies, or definable form, of bird found on the continent of North America, from the arctic districts to the eastern end of the Isthmus of Panama, together with those of the West Indies and other islands of the Caribbean Sea (except Trinidad and Tobago), and the Galapagos Archipelago: introduced and naturalized species being included, as well as accidental or casual visitors.
Página 31 - ... hard and fast lines," no gaps, or "missing links" in the chain of existing animal forms except as they are caused by the extinction of certain intermediate types;1 therefore, there can be no such group as a family or genus (nor any other for that matter) unless it is cut off from other groups by the existence of such a gap; because unless thus isolated it can not be defined, and therefore has no existence in fact. These gaps being very unequally distributed, it necessarily follows that the groups...
Página 8 - ... directly for the land. If the wind blow hard, and his nest lie in the quarter from whence it comes, it is amusing to observe with what judgment and exertion he beats to windward, not in a direct line, that is, in tlu, wind's eye, but making several successive tacks to gain his purpose. This will appear the more striking, when we consider the size of the fish which he sometimes bears along.
Página 31 - ... desirable. The imperfection of our knowledge concerning the internal structure of many groups of birds, however, makes an entirely satisfactory classification impossible at the present time, and that here adopted must therefore be considered as provisional only. An entirely sound classification of birds is a matter of the. future, requiring vastly extended investigations in the field of avian anatomy and the expenditure of an enormous amount of time and labor in elaborating the results. Some...
Página 31 - ... collating references pertaining to more than 3,000 species of birds, verifying citations of original descriptions, measuring many thousands of specimens, and other time-consuming details connected with the preparation of such a work has necessarily delayed the beginning of its publication; but most of this drudgery having been disposed of, it is hoped that future progress may be more rapid. In the following pages the attempt is made to describe every species and subspecies, or...
Página 32 - OFFER. liberal offer has never been equaled and is a guarantee of the quality of our wheels, reliable _ person in each town to distribute catalogues for us in exchange for a bicycle. Write today for free catalogue and our special offer. JL MEAD CYCLE CO., Chicago. for Safe or Exchange Strictly first-class Southern Sea-birds...

Información bibliográfica