..."I'm notsurprised they should impose upon inexperienced observers... 
Grant Allen 「An African Millionaire」
...There are two species of butterflies which commonlylay their eggs upon the hop and which resemble eachother so closely in their earlier stages that they are frequentlyconfused by ordinary observers...
Clarence M. Weed 「Butterflies Worth Knowing」
...Practically all observers emphasizethe fact that the butterflies are abundant only late inspring or early in summer, generally disappearing beforethe middle of July...
Clarence M. Weed 「Butterflies Worth Knowing」
...When it does this some observers have noted acurious habit...
Clarence M. Weed 「Butterflies Worth Knowing」
...This Spine-tail has been noticed by various observers in NorthernArgentina, and, if we are correct in referring S...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...These are the"Bell Flower Animalcules" of old observers, theVorticellæ, or Little Vortex-makers of the present day...
Henry J. Slack 「Marvels of Pond-life」
...But this would notbe so in reality, as those well know who are close observers of animaland bird life...
Harrison Weir 「Our Cats and All About Them」
...nigripes Some good observers thought that they could detect a difference in their habits, and stoutly maintained that they formed a new species...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Several observers have stated that the gander is more frequently white than the goose, and that when old it almost invariably becomes white; but this is not the case with the parent-form, the A...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Suspicion,however, has been directed by various observers to the Uromyces and the red andblack rusts that occur on clovers...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...What ishis object? Good observers have stated thathe draws a little sap in order to attract flies andwasps; that the sap is not drawn for its ownsake, but as a bait for insects...
Fannie Hardy Eckstorm 「The Woodpeckers」
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