...Cessation offoreign migration has raised Negro men's wages, to be sure—but it hasnot only raised Negro women's wages, it has opened to them a score ofnew avenues of earning a living... 
W. E. B. Du Bois 「Darkwater」
...Movement and migration is evident along this coast in ancient andmodern times...
W.E.B. Du Bois 「The Negro」
...The Colonization Society encouragedthis migration, and the Negroes themselves had organized the Canadianexodus...
W.E.B. Du Bois 「The Negro」
...Theannual migration from the south had not yet begun, or rather had not yetbrought any of the southern buffaloes that far north...
William T. Hornaday 「The Extermination of the American Bison」
...This great southward highway has been chosen by the birds ofcentral Europe as their favorite migration route...
William T. Hornaday 「Our Vanishing Wild Life」
...It is theonly song to be heard in Italy at the time of the autum migration...
William T. Hornaday 「Our Vanishing Wild Life」
...Only a short while ago they were veryoften found, during migration, in company withother waders such as the Golden or Black-belliedPlovers...
Chester A. Reed 「The Bird Book」
...It is found throughout the Argentine country, ranging south to theRio Negro, in Patagonia, but abounds most on the Buenos-Ayreanpampas, where it performs a partial migration...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...Barrows observed them in autumn on the Pigué (southernpampas) preparing for their migration...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...Male and female are always seen together,for it pairs for life, and the migration, if it has any, is only partial...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...The migration of birds is only one case of a phenomenonwhich is comparatively common...
Worrallo Whitney 「A Guide for the Study of Animals」
...However, in ourwinterless clime, migration is not complete, and this year (1910)there was probably little migration of Swallows...
John Albert Leach 「An Australian Bird Book」
...In the fall migration Kingbirds gather inloose flocks...
Frank M. Chapman 「What Bird is That?」
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