... When first he came upon them they were moving slowly butsteadily southward in one of those periodic migrations the reasons forwhich the baboon himself is best able to explain... 
Edgar Rice Burroughs 「The Son of Tarzan」
...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 arefound during migrations on or nearthe ground on the edges of woodsor thickets and along roadsides;have a peculiar habit of "teetering" their tailwhich will readily identify them...
Chester A. Reed 「The Bird Book」
...These handsome little black-cappedflycatching Warblers are abundantduring migrations, especiallyin the spring, being found on theedges of woods and in orchards...
Chester A. Reed 「The Bird Book」
...Among the insects such migrations have beenfrequently noticed, and the phenomenon has apparentlybeen observed oftener among the butterflies than in anyother group...
Clarence M. Weed 「Butterflies Worth Knowing」
...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)」
...During its spring and fall migrations only is it at allcommon about the elms and maples that men have planted...
Neltje Blanchan 「Birds Every Child Should Know」
...—Northern hemisphere; breeds in America, only in theAleutian Islands; casual in migrations and in winter in California andon Atlantic coast from North Carolina to Greenland...
Frank M. Chapman 「Color Key to North American Birds」
...But during their migrations,and in winter, when several forms may be associated, it isusually not possible to identify them in the field...
Frank M. Chapman 「Color Key to North American Birds」
...It probably visited Europe as early as the beginning of the Christianera, and since then the migrations of the people from the Far East have fromtime to time introduced the disease...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...With this separate familylife there is still in most species of birds concerted action bycommunities in migrations, in forming colonies, in attacks on othercreatures, and in defense from enemies...
John H. Robinson 「Our Domestic Birds」
...Though by no means a rare bird, the Whimbrel is of far less commonoccurrence than the Curlew, and is seen only at two periodsof the year, in May and August, when performing its migrations...
Rev. C. A. Johns 「British Birds in their Haunts」
...There is perhaps lessinformation available concerning the migrations of the wild Reindeer ofthe Old World than concerning the movements of the Barren Ground Caribouof North America (cf...
Francis Harper 「The Barren Ground Caribou of Keewatin」
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