...The migration of the Bantu is the first clearly defined movementof modern times...
W.E.B. Du Bois 「The Negro」
...Their migration commencedabout the end of the fourteenth century and was, as is usualin such cases, a scattered, straggling movement...
W.E.B. Du Bois 「The Negro」
...North of the Zambesi, in British territory, the chief role in recenttimes has been played by the Bechuana, the first of the Bantu toreturn northward after the South African migration...
W.E.B. Du Bois 「The Negro」
...The loss occurred practicallyall along their east-and-west line of migration, from Arkansas tothe Atlantic Coast...
William T. Hornaday 「Our Vanishing Wild Life」
...Theseare the "Rail-birds" or "Ortolans" which are annuallyslaughtered by thousands, for sport and marketing, during their fall migration...
Chester A. Reed 「The Bird Book」
...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」
...As such migration is likely to happenwhenever a species becomes extremely abundant it probablyis Nature's way of providing for an extended foodsupply for the succeeding generations...
Clarence M. Weed 「Butterflies Worth Knowing」
...ThisThrush has, I believe, a partial migration in Buenos Ayres...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...It is found in open thorny woods and thickets; and in Buenos Ayresseems to have a partial migration, as it is much more common insummer than in winter...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...It has, I fancy, a limited migration, as I could neverfind one in winter...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...In Buenos Ayres, where they are most numerous, they havea migration, which is only partial, however...
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)」
...I have met with this bird at all seasons of the year in Patagonia on theRio Negro, and think it probable that it has no migration...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...In the fall migration Kingbirds gather inloose flocks...
Frank M. Chapman 「What Bird is That?」
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