File:Common birds of town and country (1914) (14565131639).jpg

Identifier: cu31924022518595 (find matches)
Title: Common birds of town and country
Year: 1914 (1910s)
Authors: National Geographic Society (U.S.) Henshaw, Henry W. (Henry Wetherbee), 1850-1930 Cooke, Wells Woodbridge, 1858-1916 Kennard, Frederic Hedge, 1865-
Subjects: Birds
Publisher: Washington, D. C., National Geographic Society
Contributing Library: Cornell University Library
Digitizing Sponsor: MSN

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THE CONNECTICUT WARMER CHOOSES A DIFFERENT ROUTE TO RETURN TO ITS WINTERHOME THAN IT USED WHEN LEAVING IN SPRING (SEE PAGE 355) problems of the migration student. Afavorite theory of the past, and one stillclaiming many advocates, is that rivervalleys and mountain chains form con-venient highways along which the birdstravel in the spring, and which are easilyrecognized on the return trip. The incorrectness of this theory (at least with reference to some species) isproven by the migration routes of thepalm warblers. They winter in the GulfStates from Louisiana eastward andthroughout the Greater Antilles to PortoRico. They nest in Canada from theMackenzie Valley to Newfoundland. Tocarry out the above theory, the Louisiana
Text Appearing After Image:
THE LONGEST SINGLE P%IGHT MADE BY ANY BIRD 2,500 MILES ACROSS THE OCEAN FROM NOVA SCOTIA TO SOUTH AMERICA This map shows the migration route of the golden plover, which uses a different course onits return from its winter home (se§ page 355) 355 THE NATIONAL GEOGRAPHIC MAGAZINE palm warblers should follow up thebroad, open highway of the MississippiRiver to its source and go thence to theirbreeding grounds, while the warblers ofthe Antilles should use the AlleghanyMountains as a convenient guide. As a matter of fact, as shown on themap (page 352), the Louisiana birds nestin Labrador, and those from the An-tilles cut diagonally across the UnitedStates to summer in central Canada.The two routes cross each other in Geor-gia at approximately right angles. Another idiosyncrasy of bird migra-tion is the adoption by the Connecticutwarbler of different routes for its south-ward and northward journeys. All theindividuals of this species winter inSouth America, and, as far as known, allgo and

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