...In the short-tongued bees, with the exception of Halictus and Sphecodes, the cuckoos are quite unlike their hosts both in form and colour... 
Edward Saunders 「Wild Bees, Wasps and Ants」
...On the other hand, the cuckoos of the social species resemble them so closely in structure as well as appearance that it is more necessary to search for points of difference than of similarity...
Edward Saunders 「Wild Bees, Wasps and Ants」
... There is only one case known of a cuckoo wasp, and that resembles its host even more closely than do the cuckoos of the humble bees...
Edward Saunders 「Wild Bees, Wasps and Ants」
...Some fossors are subject to the depredations of cuckoos, just as the solitary bees are, but their cuckoos are rarely of aculeate origin...
Edward Saunders 「Wild Bees, Wasps and Ants」
...Both of our common cuckoos are slim, gracefulbirds about twelve inches long—longer than a robin...
Neltje Blanchan 「Birds Every Child Should Know」
...
Two baby cuckoos on the rickety bundle of sticks that bycourtesy we call a nest...
Neltje Blanchan 「Birds Every Child Should Know」
...I therefore do notbelieve that these cuckoos which resemble birds of prey derive anybenefit therefrom...
Douglas Dewar 「Birds of the Indian Hills」
...Stuart Baker's papers on the Oology of the Indian Cuckoos in VolumeXVII of the Journal of the Bombay Natural History Society...
Douglas Dewar 「Birds of the Indian Hills」
...The most notable performers are the cuckoos...
Douglas Dewar 「A Bird Calendar for Northern India」
...Scarcely less vociferous than the cuckoos are the owls...
Douglas Dewar 「A Bird Calendar for Northern India」
...There are also American cuckoos that buildtheir own nest and incubate their own eggs...
Frederick G. Aflalo 「Birds in the Calendar」
...Red haws have been recorded as nest trees of horned owls,yellow-billed cuckoos, cardinals, and fox squirrels...
Henry S. Fitch 「The Forest Habitat of the University of Kansas Natural History Reservation」
...Wallace thinks it may be an advantage to cuckoos,a rather feeble class of birds, to resemble the hawks,but this seems to me far-fetched...
John Burroughs 「Ways of Nature」
...Birds-of-Paradise 13; Honey-eaters 26;Cuckoo-Shrikes 11; Flycatchers 30; Cuckoos, 11; Kingfishers 11; Parrots, 22;Pigeons, 26...
A. F. R. Wollaston 「Pygmies and Papuans」
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