Bird migration (1915) (14746574521) - Public domain map

Identifier: birdmigration185cook (find matches)

Title: Bird migration

Year: 1915 (1910s)

Authors: Cooke, Wells Woodbridge, 1858-1916

Subjects: Birds Migration

Publisher: Washington, D.C. : U.S. Dept. of Agriculture

Contributing Library: U.S. Department of Agriculture, National Agricultural Library

Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

View Book Page: Book Viewer

About This Book: Catalog Entry

View All Images: All Images From Book

Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:

pre-senting distinctly segregated pathways with clearly defined borders.On the contrary, they are merely convenient subdivisions of the onegreat flightway which extends from JTorth to South America. Thereis probably no single mile in the whole east and west line from north-ern Mexico to the Lesser Antilles which is not crossed each fall bymigrating birds. What is meant is that the great bulk of bothspecies and individuals cross the GuK to eastern Mexico, while to theeastward their numbers steadily diminish. . The map of the migration routes (fig. 2) shows route No. 1 that hasnot yet been described. It extends in an approximately north andsouth fine from Nova Scotia to the Lesser Antilles and the northerncoast of South America. Though more than a thousand milesshorter than the main migration route, it is not employed by any 16 BULLETIN 185, XT. S. DEPARTMENT OP AGRICtTLTUEE. land bird. But it is a favorite faU route for thousands of waterbirds, notable among which is the golden plover.

Text Appearing After Image:

Fig. 6.—Migration of the cliff swallow (Petrochelidon lunifrons). This is a day migrant, feeding on thewing; hence it keeps near land and journeys around the Gulf of Mexico, instead of flying across it as isdone by the black-poll warbler (fig. 5) which migrates at night. (See pp. 19 and 26.) The journey of this plover is wonderful enough to be given indetail. Its most striking characteristics are a single flight of 2,400miles—the longest known flight of any bird—and an elliptical migra-tion route following different paths for the spring and the fall BIED MIGRATION. 17 migration (see fig. 4). In the first week of June the golden ))l()vcrarrive at their breeding grounds on the barren grounds above theArctic Circle far beyond the tree line. While the lakes are still ice-bound they build their shallow nests in the moss only a few inchesabove the frozen ground. As soon as the young are old enough tocare for themselves fall migration is begun by a trip to the Labradorcoast, where the

Note About Images

Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.

bird migration 1915 book illustrations ornithology birds zoological illustration us department of agriculture high resolution map of south america

1915

Internet Archive

http://commons.wikimedia.org/

public domain