...“Of course; for the end of all these invasions and migrations must be in such a sacrifice of human life as to afford sustenance and the means of subsistence to those who remain,” observed the Major... 
Captain Frederick Marryat 「The Mission; or Scenes in Africa」
...The butterflies I have seen in these wonderful migrations inCeylon were mostly Callidryas Hilariæ, C...
J. Emerson Tennent 「Sketches of the Natural History of Ceylon」
...They are very numerous intheir breedinghaunts, and, duringtheir migrations, flyin large compactflocks...
Chester A. Reed 「The Bird Book」
...These little Sandpipers areabundant during the migrations either in marshesor on beaches...
Chester A. Reed 「The Bird Book」
...They are very local in their distributionboth during migrations and in their breedinggrounds...
Chester A. Reed 「The Bird Book」
...During migrations they are found inequal abundance in swamps or orchards...
Chester A. Reed 「The Bird Book」
...This is the common Yellow Redpoll Warbler of the eastern states, and isvery abundant during migrations...
Chester A. Reed 「The Bird Book」
...The rarerspecies may be less hardy, have more enemies, be exposed to moreperils in their long migrations, &c...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...It arrives from the northin September, and is very regular in its migrations, although apparentlya very feeble flier...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
... Spring migrations begin after a few consecutive warm days in March...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...The widgeon begins its migrations early in the falland great numbers find their way as far south as theCoast marshes and lower lakes of Mexico...
Harry Thom Payne 「Game Birds and Game Fishes of the Pacific Coast」
...The cackling geese are commonly foundin flocks of the white geese, both in their feeding andtheir migrations...
Harry Thom Payne 「Game Birds and Game Fishes of the Pacific Coast」
...Fathers of his family that had accomplished many migrations appearedsmall beside him, and coats that had been shed season after seasonseemed dull compared with his...
Gene Stratton-Porter 「The Song of the Cardinal」
...In its former state, the larva, subject tostrange migrations, obviously needs the sense of sight and isprovided with four ocelli...
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
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